Hi cmarti,
I also got a TP for free these days, but it's a 600e.
Ntl we share very similar problems: a bigger HD (>128GB; with Linux und xp on it) and more RAM don't work yet. Then we both can't upgrade the BIOS (with spsdih47 in my case) because of an absent FD; I read somewhere here in the forums about someone who somehow managed to burn a bootable CD with an upgrade but finally failed upgrading because the media wasn't a floppy.
Btw, what distro are you using?
You'd find plenty of manuals and howtos at
http://tuxmobil.org/ibm.html. And last but not least here's also a linux forum---but probably you already knew that before...
My favorite is Arch, and it has a
specific wiki about installing it onto this fine machine.

And there are also ways to get an encyrpted dual boot system.
I also would like to do all that, but got stuck in the basics, or say hardware limitations as said above: The 600e didn't accept my 160GB HD, and I couldn't make use of my 2x256MB-CL3-dimms (though they are counted up correctly), too, because they are no low-density ones (see
here).
But the worst thing is, that I can't boot from CD...

Don't know, if the CDROM is broken, or if stupid me wasn't able to convince the EZsetup to boot from it (see my other
recent post). -- But you managed to boot from CD, right? So you can do me a little favour: pls. tell me
in detail how you configured EZsetup for this (the versions shouldn't differ, I guess)---this would be great!
Until I obtain a ultraslimbay-floppy I'll try to avoid those booting probs with a special promissing bm called
plop. First for testing with a (cloned) w98-partition (with boot in "safe mode" then!) from another lappy on a 6.4GB drive, and if this works on a 160GB drive, finally with xp. Let's see...
(Addition: To avoid partiton table errors I prefer to create and format/manage win/fat32-partitons with win-tools and linux partitions with linux ones...)
gµlp