Hello ftin (Welcome!),
Motion estimation set to "High quality" is better that "Fast". Also CQ is better than CQ_VBR. There's a super long thread (~40 pages) you might want to read, which is related to CQ vs. CQ_VBR, etc.:
http://www.kvcd.net/forum/viewtopic.php?t=2073
As far as the .INI file for DVD2SVCD, one of the best persons to help you is jorel, because he uses DVD2SVCD almost exclusively. I haven't used it in a while
Check the DVD2SVCD area in this forum. There are hundreds of hints there
-kwag