Hi,
If you type 'startx' to bring up the graphical window system, then you would just do the following :
[user@localhost]$ su (enter root password when prompted)
[root@localhost]# /usr/sbin/mouseconfig (its a gui - just select the mousetype, save and exit)
[root@localhost]# exit
[user@localhost]$
If you are set to automatically start the X-windows mode then you need to get a X-term (xterm, gnome-terminal, kterm, etc). These are on the programs, system menu I think (not certain because mine is highly customised from standard!). You will bring up something equivalent to a dos command window in the MS/Windows world. Then do the same commands as above.
If you really have problems - e.g. booting to Xwindows with no mouse you can do the following :
Reboot and when the lilo prompt appears at the bottom of the screen type 'linux 3' instead of just pressing enter. It would look like :
boot: linux 3
Then press enter and it should stop in console mode allowing you to do the configuration shown above.
If you don't see your particular mouse on the menu of mouseconfig then I'd suggest just choosing 'generic' (as before) or maybe 'microsoft'. If you still get the same problem then maybe you should rename the old config file and let it create a new one (you can always restore if its just a rename) :
mv /etc/sysconfig/mouse /etc/sysconfig/mouse.old
Then try again. If the original problem was X-windows related (vs console), you should also re-run 'Xconfigurator' but make sure that you don't change other settings if you're not too sure what you're doing. The mouse scroll in X is configured in the /etc/X11/XF86Config file (output by Xconfigurator) in a block like this :
Section "Pointer"
Protocol "IMPS/2"
Device "/dev/mouse"
ZAxisMapping 4 5
(Its the ZaxisMapping 4 5 that actually does the mouse scroll.)
If the above doesn't sort your problem can you be a bit more specific about what's not working, etc.
Regards