It may be useful to try to capture a user-mode dump of the explorer.exe crash to get more information on the crash.
You can configure Windows to create user-mode dumps. Create a System Restore Point first.
If you copy and paste the following in Notepad and save as a .reg file, then right-click the .reg file and select "Merge" to add to the registry, a .dmp file from a crash should be created in the C:\CrashDumps folder:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps\Explorer.exe]
"DumpFolder"=hex(2):43,00,3a,00,5c,00,43,00,72,00,61,00,73,00,68,00,44,00,75,\
00,6d,00,70,00,73,00,00,00
After explorer.exe crashes, can you then attach the .dmp file from the crash to a post in this thread.
More info on collecting user-mode dumps:
http://msdn.microsoft.com/en-us/library/bb787181(VS.85).aspx