Okay, that was pretty painless. I now have 1.25gb in this PC, and nothing horrible seems to have gone wrong.
I want to give it a few days to make sure that things are OK, after that does anyone want a 256mb DIMM?
Anyone want a packet of cardboard "CD / DVD mailers" that are about 1mm wider than a DVD without any protection, and sod-all use for anything in a sleeve? I seem to have one pack of them in with several packs of the size I actually wanted, I'm not 100% sure when I got them but it was either last year or early this year, long enough ago and they're cheap enough that I'm not even going to try for a refund. Unfortunately I somehow missed noticing that it was the odd pack out, and I've used 2 out of 50 before realising that the others are bigger.
Might be useful for mini CDs, floppies, or something. Heavy enough that I don't want to post them, but if anyone wants me to bring them to the Tun or something...
later - Binned