installation problems

[Alexander Matthaei]

Hello,
I don´t know if this is the right adress for this,
but I hope that you can help me.
I´m a windows user and I just wanted to check other possibilities, so I
downloaded and installed Linux.
After a while I wanted to try the other systems, so I downloaded freebsd.
I still got windows, but BSD has its own partition.
BSD works, but the problem is that I can´t install many programs, like KDE
or Gnome.
Also, the X window server doesn´t work proper. 
I think the configuration is right, because Linux had no problems with it.
If you need more information about my PC, here you are:
Pentium 4 (2000mhz)
Nvidia geforce4MX 460
256MB DDR ram
I don´t know if this was necessary, but why not?
Please help me.

Alexander Matthaei

p.s. Please excuse my english. I´m from germany and really not good at
english.