Index: /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp	(revision 87316)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.cpp	(revision 87317)
@@ -161,4 +161,14 @@
 }
 
+bool UIFilePathSelector::isValid() const
+{
+    if (m_strPath.isNull() || m_strPath.isEmpty())
+        return false;
+    QFileInfo fileInfo(m_strPath);
+    if (!fileInfo.exists() || !fileInfo.isReadable())
+        return false;
+    return true;
+}
+
 void UIFilePathSelector::setToolTip(const QString &strToolTip)
 {
Index: /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.h	(revision 87316)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIFilePathSelector.h	(revision 87317)
@@ -111,4 +111,7 @@
     QString path() const { return m_strPath; }
 
+    /** Returns true if the selected path points to an existing/readable file. */
+    bool isValid() const;
+
     /** Sets overriden widget's @a strToolTip.
       * @note If nothing set it's generated automatically. */