Im very new to this, so far i've only converted avi's to kvcd. Now i have hq svcd files which were originally created for putting 2 on one cd. (Each video file is about 21mins and about 370mb svcd)

I'd like to keep the high quality, so in view of that, would it be possible to do this whilst putting 6 video files on one 80min cdr? - coming to about 135 minutes? Also the source is fullscreen, which wil make a difference.

Also on a related note, who low can i go with cq in tmpgenc before the video loses its quality?

135 min in SVCD resolution (480*576) fullscreen is way too much ! You won't be abble to put that decently on a CD. You can put easily 4 of them, but not 6.

Generally, if you like quality, CQ under 65 starts to give unwatchable low quality.