VP62 & VP70 are fully VFW compliant codecs, so they show up in most of the softwares (unless a software is made in such a way that it works only on few codecs) ...
When you are installing K-Lite Mega Codec Pack just make sure that you manualy select VP62 & VP70.
VCDGear is just for converting *.DAT VCD MPEG-1 files to *.mpg the right way ... it has nothing to do with anything else.
I think what you were referring to is VirtualDub ... and now the latest version of VirtualDub can import directly from *.DAT files, so u dont really need VCDGear as such!!!
Yes .. having VirtualDub is a big Plus ... its a good software!!!