One more thing I forgot to mention, a free video converter that you may not even know you had - I certainly didn't until a vague mention on a site stirred up long dormant memories
If you have a recent ATI video card, (I have a HD4850), then there's a video converter you can download along with the latest Catalyst Control Center - the ATI Avivo Video Converter
Choose a video file, choose the output format, (iPod, MPEG4, Portable Media Center, MPEG1, Super VCD, DVD, MPEG2, etc), choose the output quality, hit Start.
Results are a decent quality, (possibly a bit softer than I'd like), even though it does screw things up sometimes, (eg. PAL avi converted to NTSC MPEG even though it correctly recognised it at 25fps).
And it is fast, 349MB 48 minute 624x352 MPEG4-ASP video converted to 1.2GB, 8Mb/s 480x272(?!) DVD, (this is not a DVD compatible frame size - wth are they doing!?), in just over 5 minutes.
Then it's just a matter getting them onto a DVD, either by authoring or as files.
One thing, make sure the Catalyst Control Center is in Basic Mode or else you'll have a very hard time finding it.
Personally, I don't use because of the limited control you have over the output - if they added options for output resizing and sharpness, then I might start using it more often and get some use out of the GPU.