Can Security Update CD's be customized?

[Dehcbad25]

The Security CD is actually updated every month and released with the technet subscription. To be exact they are 3 CDs, and the last one is the one updated every month. Slipstreaming to that CD should not be difficult. Actually not needed, just copy the files to the hard drive and add folders as you like. Even change the html, or copy the content and add the new files.
PS, there should be a scan file. If you follow my method, the scan might not work. You will need a new cab file which has the information to be scanned together with the updates. The cab can actually be found easily since it is used by SUS server. I don't know the url though