That's entirely up to you. The reason I suggested this, is that most of the more "evolved" modification ideas involve minirt.gz and /init. Including yours, I think I know about 5-7 modifications, which could be implemented as patches.

Using a 2 GB liveUSB surely belongs to the sports department these days, yes, but that does not make it uninteresting. Rather the contrary, it is very useful for proofs of concept. And BTW, to create a pure 64 bits Knoppix we should probably start with the CD package selection, and stay around there until issues are resolved satisfactorily. Also, for pure forensic purposes, the CD size install is the best, I think.