Private Message is most likely in the console (hit the ~ key, beside the 1 key) IDK how to do the actual PM. The only thing I do know is how to share credits (if the server has it enabled):
Open the console.
Type:
/share tsurano 1000
to give you 1000 credits or
/share tsurano 5
to give you 5 evos... you can share small amts of credits if you want, too.
This would IMHO also be useful for the manual.
For screenshots; I use FRAPS; It's not free, but the free version lets you save screenshots to BMP format (full version = JPG, PNG & TGA also), and record video 30 seconds (full version = as unlimited as your hard drive's capacity).
This way, I can use one prog to take screenshots / movies (with sound) in all games... it even works for video clips in DVD players or media players!
Does anyone know of a free / open-source prog that does the same thing? I like FRAPS, but I'm sure not everyone likes to pay for it... (although it's only $37 USD)