I did render my dv movie as mpg 2 file and I use unlead movie factory to make my dvd also from print to tape i made a vhs copy some how my vhs copy looks much sharper and my dvd why is that any help please thank.
"did render my dv movie as mpg 2 file and I use unlead movie factory to make my dvd "
There's your problem right there. If you import a MPEG-2 file into Ulead Movie factory to make a DVD, then the Ulead program will re-encode that video to MPEG-2 again even if it is a completely compliant MPEG-2 stream to begin with. Now you have a compressed video that is being recompressed again for no reason. That is why you are getting a really crappy picture quality. This is one of my major gripes about the low end DVD authoring programs, they always want to re-encode everything even if it is fine to begin with!
I haven't worked with the Ulead products in a long time, mainly due to that reason, but you might want to render out a AVI-DV file out of Vegas of your project, then import that into the Ulead program and have it encode it to MPEG-2, that way it is only getting encoded once.
If Ulead DVD Movie Factory 2/3 are set up correctly, and the MPEG-2 files you are loading in are DVD compliant, then it won't re-encode the files - I use DMF2 all the time with MPEG-2 files and never re-encode.
Check the MPEG settings in VV and DMF carefully (particularly the 'do not re-encode compliant files' tick box in DMF).