Hi Chris,
Have a look
here - You should be ok if you follow the instructions there. With a Radeon 9000, you should also be very pleasantly surprised at the result !!
To get the actual Powerstrip settings as a Custom Resolution you should put the following string into a text editor (notebook will do fine), copy the text, and then paste it into the Custom resolution screen in Powerstrip using the Paste function.
856x480=856,40,72,80,480,4,5,11,31500,342
Also make sure you've goot the following settings on the AE100 itself:
Panny AE100 special setting:
Option->PC Priority->WIDE
Once you've seen W480 on the AE100, you'll be spoiled forever !!
All the best,
Sean G.
Edit to change link - wrong one used originally.