OK I found the answer to multi disk images here:
viewtopic.php?p=7205#p7205 although I didnt see that part in the manual. I'll have to look again. I found my answer about the ram too and that the fat32 loader releases the ram after kickstarting. I found a post with a sideloader for tempest xtreme. Mybios replaces the OSrom and banks out the original so thats nice.
Any instructables out there for burning a MyBIOS rom and installing a bios switcher? Ive written eeproms for the PC before using a special ISA card.