VCDpad is a small unix tool used to fix up MPEG
system streams so that they can be used by VCD
creation programs like mkvcdfs or VCDImager
Unfortunately for me, VCDImager now does the work of VCDpad itself, so my program is no longer very useful. I do occasionally use it to try to do simple fixes to some broken MPEGs.
For those who are still interested in looking at it, or actually using it, it can be found in the deep dungeons of Freshmeat.