hmm, well that's progress

You have a different problem now though... it seems that Xandros uses a very old version of glibc, too old for planeshift. PS should require 2.3.3 (although that says 2.3.4 for some reason... I figure what I used is patched and that they're binary compatible), and what you have is 2.3.2.
Basically, all that means that you can't run PlaneShift with Xandros until they update their glibc version (I would suggest you contact xandros support if you bought it), or unless you compile yourself (difficult to do).
Xandros is 32-bit only, so you won't be able to run 64-bit programs on it, even though you have a 64-bit processor. It doesn't make too much difference, but that's the reason for your last problem. Having a 32-bit only distro can actually be an advantage right now, as it's much better supported.
There is the option of switching distro, to something like Ubuntu which is very nice.