SVCD is also encoded (standered svcd) at 480x480 ntsc (not sure for pal) and can have a variable bitrate (like dvd) just like dvd, but most standalone dvd players will not read above 3500kbps (on svcd that is) and just like the above post, svcd is mpeg 2
VCD is encoded (again standerd vcd) at 352x240 ntsc at 1150kbps which is what the saturn will read. don't know if you need a special authoring program to burn (don't have the card, so i've never tried cdr to see if it worked) them, but i would imagine that it would work