Sorry it took so long, but I think I'm ready to give this another go...
We're not using DOOM Legacy anymore. This time we're just using good old Vanilla DOOM (the original version of the game) under DOSBox. The following link is a copy of Shareware DOOM bundled with DOSBox already set up to join my server online:
DOOM Shareware (Online)
Only 3 people can join my server at a time, and they all have to be joined and ready before the game can start (the limitations of Vanilla DOOM). So if you wanna take part in this, reply to this thread saying you will, and once I have 3 volunteers, I'll set a date and time as to when we'll do a deathmatch (or co-op run)...