I wouldn't say that CCE was only good at hight bitrate stuff. The whole point in using it for SVCD and DVD is that it handles low bitrate MPEG2 much better than TMPGEnc.
That said we are talking MPEG1 here, which I have not tried. No need for a specific guide though, all you need to do is make sure that your source is 352x288/240 with 44.1KHz audio and then select VCD in CCE.
If your source is AVI then just use AVISynth to resize, add borders, etc.