General :: SSD Trim Simple Bash Script Program?

I wrote this script which works but it should run automatically about once per week. I hunted and experimented with KDE Task Scheduler (no dice and no help anywhere) and cron (confusing instructions and cannot edit crontab -e with vim, and cannot enter cron folders/files). I would settle for a desktop shortcut to run the script but found no for that.

Script:

Code:

#!/bin/bash
xterm -hold -e fstrim -v /
Machine:
OS: openSUSE 11.4 x86_64

[code].....