1st please turn off PnP in the BIOS, that may help.
for the palm piolet there are several apps used to access them, i don't have a palm myslef but i know they exist. for USB - this should be really easy redhat 8 - try running /etc/init.d/kudzo at the command line as user root - it should set it up for you.
for the bootloader have a looky at the example here:
basically if you add teh chainloader part it should work, then you will need to run grub-install