I did the same with my ThinkPad 380ED.
I've got a pile of Librettos still running win98, as long as mIRC works I guess.
My Amiga's and DOS machines are online too.
I recall trying to compile a 2.4ish kernel with support for my pcmcia network card on an old 486 sx25 (dx?) laptop. Never got it to work. The desktop was fine from redhat 6 onwards (under 5.2 my sis graphics card wouldn't work in graphics mode, so no X)
Its going to be dire.