Just follow my normal DVD to DVDR tute but in DVD2SVCD, select Anamorphic 16:9 and then tick in the Framserver tab the box "Edit as part of Video Encoding". Then start as normal, but just before CCE starts encoding the avisynth script pops up ready for you to edit. Edit so it reads similar to (its been a long times since I've done this so not 100% sure about the figures):
Crop(0,72,720,432) <-- insert this line here
BiCubicResize(720,576,0,0.6) <-- edit this line if necessary
AddBorders(0,72,0,72) <-- delete this line if it exists
For NTSC change the 72 to 60, the 432 to 360 and the 576 to 480
Hope that works.