Rearranging the Resource ID's for MFC appication

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MFC

ATL

VisualC++

I am working on Enterprise MFC application where the resource ID's are out side the Microsofts recommended range. Due to this ...

1. So when this application is run in Debug build asserts are shown(bcoz of out of range resource ID) and I am not able to run this application in Debug build. In release build the application works fine.

2. User has the facility to store the workspace i.e he can save the windows, their position, and other data in workspace. The Command ID's for the Menu's are stored in workspace file. If command ID's are changed in resource.h then
workspace's from the old version will stop working.
If the Command ID's are changed in resource.h then old workspaces need to be migrated. Is there anyway to make the workspace independent of Command ID and ensure that workspace migration is not required in future?

3. Also need to cleanup unused resource ID's
Is there any way to cleanup the resource ID which are unused?