Just type /msg followed by the nick and then your message, like:
/msg tid|away Hello!
And then you'll message him!
If you could list what issues (and evt. contents) of those demo discs you've got, then I'd appreciate it a lot.
Also, if you've got any non-magazine demo discs, or "special" demo discs (bundled with other games or just "exclusives" from certain magazines) then that'd be great too!
I've got everything you could possibly dream about, just let me see what cards you've got on your hand and I'll show you mine.
You're looking at old stuff!