USB booting :: adding usb support

Hi I actually have several questions.

1) How to I add USB/Firewire support for DSL? I am booting off my thumb drive but would also like to add usb support for keyboards/mice, and FW support for external HDs.

2) Can I edit the boot menu to select from multiple boot disks? I have many boot disks at my work, each one is for a different type of system with all the proper network drivers and everything to network boot a system. I want to copy all my .iso's of boot disks onto my thumb drive and have a boot menu pick which boot disk to use. How do I accomplish this?

thanks for any help in advance.

original here.