Here's how, open up Konsole and then:
su
vi /home/zaurus/Documents/Settings/
Then use the arrow keys to navigate down the page until you come to the [Screensaver] section, find the line which looks something like Interval = 1800, changing this affects the suspend time on battery power, position the cursor over the character "1" and hit shift+r and type in 604800 and then press the cancel button. If all has gone well it should look like Interval = 604800 and then press :wq (case sensitive) to save the document and quit.
That has set your suspend timer whilst on battery power to 604800 seconds which is exactly 7 days (but we all know the battery won't last that long hehe). Be careful as this WILL run your Zaurus's battery down completely and there may be complications with trying to charge a fully discharged battery (it's recommended you switch off when you get the low battery warning so that you don't screw the battery up).
Now, if you wanted to do the same for AC power as well, you'd do all the steps as above however you would find the line Interval_AC_09 and change that to 604800 and then 2 lines underneath it Interval_AC_idx you would change to 9 so it points to the above.
Please bear in mind that if you go in to the Light and Power applet again you will probably nullify these changes you've made so try and avoid it Good Luck
