The are Two ways to go about this, You can Make a Non-Standard DVD and Burn the SVCD"s as they are to DVD (Just re-encodeing the Audio to 48000hz) This way you do not loose Any Video Quality But not all DVD Players will Play the DVD, Of you Can re-encode the Video and Audio to DVD Specs and Loose a Lot of Quality But all DVD Players will play the Disk...All you need to Burn SVCD"s to DVD without Re-encodeing is to use a DVD authoring Program called "DVD-Lab" "
http://www.mediachance.com/dvdlab.htm/" and it will author the SVCD"s to DVD...To Re-encode the File then you will need a Good Quality Mpeg encoder Like CCE or Tmpgenc or MainConcept and encode the Files to DVD Compliant Mpeg2 files then Burn them to DVD with your DVD authoring Program, If you have DivX avi files you will have to do the same with them...It is to long and Complicated Proscess to explain it all here as it would take to long to explain but you can read up on this type of Stuff here "
http://www.dvdrhelp.com/" ....Good Luck