From: Vancouver, B.C. Canada
Well, you need to rip the MPEG out of the VCDs, which is usually as simple as copying out the .dat file and re-naming it .mpg. Then I would suggest loading it into TMPEG or something similar, and combining the MPGs. Alternatively, you could just load each mpg as a seperate track on the new VCD that you author in Nero. That would be easier, but there would be a tiny gap during playback when you switch between files.
Hope that helps!
Canada; Leading the world in being just north of the U.S.A.