hey Roger,
If disk space is the main challenge here, I would suggest going with the route of a junction. I think that's the least impacting solution.
See this link: Junction
Add a new disk volume with enough space, and mount it. say its called e: drive (enable 8.3 file name support there)
1) stop CABI (tomcat + server intelligence agent)
2) ensure no other CABI client programs (OR any other CA programs) are still using c:\program files (x86)\CA folder
3) Copy C:\program files (x86)\CA to E:\program files (x86)\CA (don't move, copy first, you can delete source folder later)
4) Rename C:\program files (x86)\CA to C:\program files (x86)\ORIGINAL_CA
5) Create a junction E:\program files (x86)\CA pointing to c:\program files (x86)\CA
Note: so, from now on, your c:\program files (x86)\CA is basically the e:\program files (x86)\CA
6) start up CABI make sure everything is still OK
7) delete C:\program files (x86)\ORIGINAL_CA to recover the space that was getting tied up.
Hope this helps
_R