Spent most of last night backing up my system (all 61,581mb over 15 DVD's [wow]) and cleared out my 'games' partition to make space.
I haven't checked it yet, but I've hopefully managed to dual-boot with Windows XP so that I don't render my computer useless. Seems that the internet is working and I can get through to GDNet which is good enough.
(click to enlarge)
I'm gonna go and explore the system and try and get everything working - it's currently got all the default settings.