I kept getting an error about JScript not being enabled ("Scriping language JScript is not supported").
If you have this same problem, just find jscript.dll on a windows machine and copy it to your machine into the "drive_c/windows/system32" folder of your Case Studio bottle (for me the full path was "/home/dday/.cxoffice/Case Studio/drive_c/windows/system32").
Then open up the CrossOver Configuration application and get to the Configuration window for your Case Studio Bottle. There should be a "Control Panel" tab in that window from where you can run a windows command inside that bottle. Just run "regsvr32 jscript.dll" to register the jscript.dll and run Case Studio again. You shouldn't get the JScript error anymore.