I was feeling optimistic about the possibility because of the reinstall instructions in the phpBB FAQ, it all sounded really good, I just needed to sort out the 'phpMyAdmin' part. :\
Really need to get something sorted out because my board was hacked last night, I was lucky only the Index was changed (thank you for sparing my forum Yossi).
I haven't tried updating with a patch file because I'm not sure what this means:
Does that command line refer to the "Run" command in Windows?
Yes I am really that daft (why I haven't updated the forum software) saw the bit about .rej files and HUNK FAILED and thought this is really out of my depth.
When I installed the board I migrated a lot of old topics from an 'ezboard' forum, and I was amazed it worked at all, but the dates got completely whacked. Had no idea at all what I was doing and thought maybe a clean install with a new configuration would be a good idea.
Thanks very much for your advice.