I would suggest you try authoring some SVCD using the DVDLab tutorial (an excellent guide) to test out your players. Just because they pplay SVCD on CDR's doesnt meean they will automatically play them on DVDR's. Test one first to be certain.
To make one big MPG without splitting, run as the Tute says, but in the Bitrate Tab, instead of use 2 CD's, change that to 1 and increase the disk size from 800 to 1600. Then the bitrate will remain exactly the same but in 1 big MPG file. Do similar for the lines that would normally make it into 3 CD's. (change CD to 1 and disk size to 2400).
You can use mpeg2dec3.dll if you wish. There are a few versions of that around, not sure if all will work. But hey, just pontv to it and give it a try, nothing to loose.
Yes its pretty much upto date as well.