Four (even five) problems/queries on my FreeBSD installation

[lars.lindblad]

Hi. I have installed 5.4/KDE on my Thinkpad 600E, and it
mostly works but there are a few things I need help with.

(Please note that I still consider myself being a newbie on
FreeBSD!) ;)

1. I installed KDM to make the computer a little more
userfriendly, but now I can't run things as su. Emacs
refuses to start for instance, and when I am trying to
adjust things in Login Manager (in KControl) it asks me for
the root password, I enter it, and then I bounce back. What
is the problem? I still can run emacs as lars, but not as
superuser. (I can su in a terminal window of course)

2. During my window years (those are goodbye now! ;) I
bought a TwinMos 256Mb USB-memory, and FreeBSD finds an
umass device when I put it in my Thinkpad, but how will I
mount it? Can it be done?

3. Since I installed KDM I got the "Turn off
computer"-option in KDE, but it only runs FreeBSD to a halt,
not to a complete power down - how will I chance that?

4. As su I can use tab to complete filenames, but not as
user lars. I guess it has to to with which shell I use, how
do I change shell? Or is it another way I can get the
possibility to use tab to complete filenames?

5. My girlfriend found the Klickety-game in KDE - anyone
else here having the same problem? Your computer being taken
by someone who wants to play the games so you cannot sit for
hours and hours and have fun tweaking the system? ;)

Hope someone can help me! Thanks in advance!

   / Lars