Why not run two versions of TS2012. One TS2012 SP1 HF4 61388 and the other TS2012 49922. In the 49922, install S&C using the .ja file method (& serial number). That way, in TS2012 49922 you can edit S&C till your hearts content...
(The same editing options are available for Murchison 2 & Carbon City, using the .ja file method in 49922 or anything else back to TRS2006)...
Cheers, Mac...