Okay, so hitting a few problems...
The sprites again are fantastic, but 1. they're more than 16 pixels wide (which is fine, I'm just overwriting the biker), and 2. more importantly, I don't seem to be inserting them properly. I convert them to bitmap, reduce color depth with Irfanview, cut it into 32x32 front, back, and sides, and then when I insert it, the colors are nuts on pallette 6. I think I missed something :\