Thanks for the help - I've got it installed and bootable now.
I would normally have gone for the Boot FreeBSD option, but I really didn't want to do the wrong thing and have to go through the whole booting from floppies procedure again - apart from taking so long to read from them, I only had 2 working ones, so I had to keep copying the next floppy image onto the disk that wasn't currently in use... no fun.
I should, however, have lots of fun with my new FreeBSD-in-a-wardrobe!
My top shelf was empty, and I had an old system with no case...
Not the best setup for efficient cooling, but it's only a 133MHz (I think) Pentium I, so no worries :P
[edit]
Ooh no, it's a 166! Woooo!