Hi Jon,
> I have installed BitTorrent-4.2.2 on my 3.9-box.
Eek. Upgrade. :-)
http://openbsd.alphix.se/faq/upgrade40.html

http://openbsd.alphix.se/faq/upgrade41.html
> With this i would like

quoted text
> to start file sharing on a console, logout, login later and reattach to

> the console of the BitTorrent-4.2.2 session. AFAIK this is done in most

> Linux-distros using the command screen, but how can I do it in BSD?

With screen? ;-)
http://openbsd.alphix.se/faq/faq15.html
It could be as simple as `sudo pkg_add -i screen` if you've set the

PKG_PATH environment variable.
HTH and good luck... Nico