Hi Jamie,
If you look in C:\Documents and Settings\Classmate\Resources\?Class Name?\Curriculum Resources You will see the dead shortcuts, these are the ones not installed on that PC and are causing the error message.
To remove the dead ones from all classes you can use a command line or create a batch file
cd "C:\documents and settings\classmate\resources"
del /s "deadshortcut.lnk"
Regards
Tezza24uk