I would come to help out, only I'm nowhere near London
Xandros on the eee is a slightly odd system. Not having used one, the main issues I anticipate might arise are:
Installing a compiler and tools
Installing the Allegro library (both the runtime library itself and the -dev package that allows you to compile things with it)
I can't seem to find a list of packages available in the eee Xandros, so first I'd try using the default install to grab the packages named in the RPCEmu guide. Here's the procedure:
If that fails, you'll probably have to add some repositories. Try this:
That suggests that using vanilla Debian repositories isn't a good idea, but there are others listed.
(who might be persuadable to be around on IRC at the time if someone points me at a channel)