diff --git a/libqnono/ccrosspackage.cpp b/libqnono/ccrosspackage.cpp
index b99c9c1..4723182 100644
--- a/libqnono/ccrosspackage.cpp
+++ b/libqnono/ccrosspackage.cpp
@@ -24,8 +24,7 @@
 
 namespace libqnono {
 //public:
-	CCrossPackage::CCrossPackage() : m_File(NULL) {}
-	CCrossPackage::CCrossPackage(QString fileName) : m_FileName(fileName), m_File(NULL) {}
+	CCrossPackage::CCrossPackage() : m_File(NULL), m_headersOnly(false) {}
 	
 	CCrossPackage::~CCrossPackage() {
 		close();
@@ -60,7 +59,7 @@ namespace libqnono {
 		}
 	}
 	
-	bool CCrossPackage::readHeader() {
+	bool CCrossPackage::doReadHeader() {
 		QDataStream in(m_File);
 		in.setVersion(QDataStream::Qt_4_0);
 		
@@ -95,10 +94,12 @@ namespace libqnono {
 		}
 		m_Name = stringBuffer;
 		
+		m_headersOnly = true;
+		
 		return true;
 	}
 	
-	bool CCrossPackage::readData() {
+	bool CCrossPackage::doReadData() {
 		if (!m_File)
 			return false;
 		
@@ -133,10 +134,40 @@ namespace libqnono {
 		if (i < pictureCount)
 			qWarning("damaged package file - invalid picture count");
 		
+		m_headersOnly = false;
+		
 		return true;
 	}
 	
+	CNonogram * CCrossPackage::takePicture(int ndx) {
+		loadPictures();
+		CNonogram * result = m_PictureList.takeAt(ndx);
+		unloadPictures();
+		return result;
+	}
+	
+	bool CCrossPackage::loadPictures() {
+		if (!m_headersOnly) return true;
+		if (!open() || !doReadHeader() || !doReadData()) {
+			close();
+			return false;
+		}
+		close();
+		return true;
+	}
+	
+	void CCrossPackage::unloadPictures() {
+		if (!m_PictureList.empty()) {
+			foreach (CNonogram * i, m_PictureList) {
+				delete i;
+			}
+			m_PictureList.clear();
+			m_headersOnly = true;
+		}
+	}
+	
 	bool CCrossPackage::save() {
+		Q_ASSERT(!m_headersOnly);
 		QFile file(m_FileName);
 		if (!file.open(QIODevice::WriteOnly))
 			return false;
@@ -154,4 +185,26 @@ namespace libqnono {
 		file.close();
 		return true;
 	}
+	
+	CCrossPackage * CCrossPackage::read(QString fileName) {
+		CCrossPackage *p = new CCrossPackage();
+		p->setFileName(fileName);
+		if (!p->open() || !p->doReadHeader() || !p->doReadData()) {
+			delete p;
+			return NULL;
+		}
+		p->close();
+		return p;
+	}
+	
+	CCrossPackage * CCrossPackage::readHeader(QString fileName) {
+		CCrossPackage *p = new CCrossPackage();
+		p->setFileName(fileName);
+		if (!p->open() || !p->doReadHeader()) {
+			delete p;
+			return NULL;
+		}
+		p->close();
+		return p;
+	}
 }
diff --git a/libqnono/ccrosspackage.h b/libqnono/ccrosspackage.h
index bb48f2c..d137f77 100644
--- a/libqnono/ccrosspackage.h
+++ b/libqnono/ccrosspackage.h
@@ -33,29 +33,38 @@ namespace libqnono {
 	class CCrossPackage {
 	public:
 		CCrossPackage();
-		CCrossPackage(QString fileName);
 		~CCrossPackage();
 		
-		virtual void setFileName(QString & value) { m_FileName = value; }
+		void setFileName(QString & value) { m_FileName = value; }
 		QString fileName() const { return m_FileName; }
 		
 		void setName(QString value) { m_Name = value; }
 		QString name() const { return m_Name; }
 		
-		bool open();
-		void close();
+		QMonoPictureList & pictures() { Q_ASSERT(!m_headersOnly); return m_PictureList; }
+		CNonogram * takePicture(int ndx);
 		
-		bool readHeader();
-		bool readData();
+		bool loadPictures();
+		void unloadPictures();
 		
 		bool save();
 		
-		QMonoPictureList & pictures() { return m_PictureList; }
+		static CCrossPackage * read(QString fileName);
+		static CCrossPackage * readHeader(QString fileName);
+		
+	protected:
+		bool open();
+		void close();
+		
+		bool doReadHeader();
+		bool doReadData();
+		
 	private:
 		QMonoPictureList m_PictureList;
 		QString m_FileName;
 		QString m_Name;
 		QFile * m_File;
+		bool m_headersOnly; /** valid headers but no pictures */
 	};
 }
 
diff --git a/libqnono/ccrosspackagelistmodel.cpp b/libqnono/ccrosspackagelistmodel.cpp
index 8b539eb..0ed035d 100644
--- a/libqnono/ccrosspackagelistmodel.cpp
+++ b/libqnono/ccrosspackagelistmodel.cpp
@@ -45,13 +45,8 @@ namespace libqnono {
 		QDir workDir(m_DataPath);
 		QStringList fileNames = workDir.entryList(QStringList(m_DataFilter), QDir::Files | QDir::NoDotAndDotDot, QDir::Name);
 		foreach (QString fileName, fileNames) {
-			newPackage = new CCrossPackage(workDir.filePath(fileName));
-			newPackage->open();
-			if (newPackage->readHeader())
-				m_PackageList << newPackage;
-			else
-				delete newPackage;
-			newPackage->close();
+			newPackage = CCrossPackage::readHeader(workDir.filePath(fileName));
+			if (newPackage) m_PackageList << newPackage;
 		}
 		
 		reset();
diff --git a/libqnono/ccrosspackagemodel.cpp b/libqnono/ccrosspackagemodel.cpp
index e59c28a..fa12d47 100644
--- a/libqnono/ccrosspackagemodel.cpp
+++ b/libqnono/ccrosspackagemodel.cpp
@@ -69,16 +69,12 @@ namespace libqnono {
 	
 	void CCrossPackageModel::setPackage(libqnono::CCrossPackage * package) {
 		if (m_Package)
-			m_Package->pictures().clear();
+			m_Package->unloadPictures();
 		
 		m_Package = package;
 		
-		if (m_Package && m_Package->pictures().isEmpty()) {
-			m_Package->open();
-			m_Package->readHeader();
-			m_Package->readData();
-			m_Package->close();
-		}
+		if (m_Package)
+			m_Package->loadPictures();
 		
 		reset();
 	}
diff --git a/libqnono/cnonogram.h b/libqnono/cnonogram.h
index 4c11624..77f1227 100644
--- a/libqnono/cnonogram.h
+++ b/libqnono/cnonogram.h
@@ -35,7 +35,9 @@ namespace libqnono {
 		CNonogram(QSize size);
 		CNonogram(QImage & image);
 		CNonogram(QDataStream & stream);
+		CNonogram(const CNonogram &other);
 		~CNonogram();
+		CNonogram& operator=(const CNonogram &other);
 		
 		void loadFromImage(QImage & image);
 		void resize(QSize size);
diff --git a/qcross/cnewgamedialog.cpp b/qcross/cnewgamedialog.cpp
index 5b1341d..80b7c36 100644
--- a/qcross/cnewgamedialog.cpp
+++ b/qcross/cnewgamedialog.cpp
@@ -117,7 +117,7 @@ namespace qcross {
 			if (selected.isEmpty())
 				result = NULL;
 			else {
-				result = static_cast<CCrossPackage *>(selected[0].internalPointer())->pictures().takeAt(nonogramIndex());
+				result = static_cast<CCrossPackage *>(selected[0].internalPointer())->takePicture(nonogramIndex());
 				m_PicModel->setPackage(NULL);
 			}
 		}
diff --git a/qcrossedit/cmainwindow.cpp b/qcrossedit/cmainwindow.cpp
index 975d0c1..746d48d 100644
--- a/qcrossedit/cmainwindow.cpp
+++ b/qcrossedit/cmainwindow.cpp
@@ -124,15 +124,10 @@ namespace qcrossedit {
 			if (m_Package)
 				delete m_Package;
 			
-			m_Package = new CCrossPackage();
-			m_Package->setFileName(fileName);
-			
-			if (!(m_Package->open() && m_Package->readAll())) {
-				delete m_Package;
-				m_Package = NULL;
-			}
-			else
+			m_Package = CCrossPackage::read(fileName);
+			if (m_Package) {
 				statusBar()->showMessage(tr("Package \"%1\" opened.").arg(m_Package->name()));
+			}
 			
 			qobject_cast<CCrossPackageModel *>(m_PicListView->model())->setPackage(m_Package);
 		}
@@ -186,7 +181,7 @@ namespace qcrossedit {
 	}
 	
 	void CMainWindow::editSetTimeout() {
-		QInputDialog::getInt(this, tr("Set time-out for selected nonogram (in minutes)"));
+		QInputDialog::getInt(this, tr("Timeout"), tr("Set time-out for selected nonogram (in minutes)"));
 	}
 	
 	void CMainWindow::editDelete() {