You can add a line to the /etc/fstab file so regular users & KDE can mount:
/dev/hdb1 /mnt/windows vfat user,umask=0,auto 0 0
'user' lets regular users mount, 'umask' sets permissions because you can't do it the regular way on win drives, 'auto' mounts automatically on startup. Add the line with any text editor. Note that Mandrake might have already put the needed line there, so you can just go to the folder where it is to be mounted (if the line is like the example I gave, that folder would be /mnt/windows).