Hi, Hi and HI again, (High Intelligence),

Let help me in the following: I decided to use my old computer for torrent downloads and perhaps for mirroring the slack -current.

However, the computer is rather weak:
Celeron 1,2Ghz, 256 MB RAM,

so, which slack release is better to use?

I aim to use the jfs file system, but I'm not sure it is good choice.

As always help, advices are very welcome.

You can run Slackware 13.0 on this machine, but forget about X or any DE/WM.

I have a box running Slackware 13.0 with a slower processor and it's running fine, doing a lot more than downloading torrents.
It has more memory, but only uses 200MB (and that is with Squid, MySQL, httpd, DansGuardian, and some other stuff).
Running "idle", with only standard Slackware 13.0 (this includes sshd), it uses about 35MB, so enough left to load a torrent program.

I suggest taking a look at rtorrent, which is completely text based, no GUI needed.
You can start it withing a screen session, so that you can "connect" to it from other boxes.

+1 for rtorrent (it's available from slackbuilds.org)
I've been using it on all my computers for over 2 years. You can't go any more lightweight when it comes to torrents and it's very configurable.

btpd (also in slackbuilds.org) is a really nice command line torrent client

Thanks for both of your. I will follow your advices. Perhaps in the future I will manage to add some more RAM.

Thanks for all of you.