Getting the files from your DVR HDD and into a computer is usually a rub. Some recorders with a Firewire port can be hooked up with an appropriate cable and the files copied, but this sometimes requires a hacked firmware. The easiest way is probably to simply get a cheap DVD recorder and hook its input up to the Hunan's output and do a straight dub, but quality suffers if the only connection possible is the composite ports. S-Video out & in is better, but component is better still. Another option is some kind of HDMI input capable video capture device akin to the AVerMedia AVerTV HD DVR
card or some equivalent - usually ~$100.
If you do manage to get the files exported, most commercial entry-level video editors (Adobe Premiere Elements
, Corel Video Studio Pro
, MAGIX Movie Edit Pro
etc.) can transcode widescreen HD content into a 16:9 formatted DVD format and burn the disc with good quality. The rub is always what the file format of the sources is,. If it's a standard format like any of the MPEG's (1, 2, 4, TS, H.264 etc.), Quicktime, DivX etc then you should be all set.
These are usually available as free trials with varying degrees of functionality so you can give them a shot. You can usually find previous releases online at a serious discount, though I wouldn't go back more than 1 generation. They are also usually seriously discounted just before a new build comes out.