New G5, Need to Test!

Ive had a PowerMac G4 MDD dual 1.33GHz for a while now, and I finally decided to upgrade to a G5. I know all the pros and cons to PPC's vs Intel, but I didnt want to spend $600~ on a first gen Mac Pro. Instead I got myself a fully functional (as far as I can tell!) PowerMac G5 Quad 2.5GHz model. It has dual 120GB HDDs in RAID 0, a Superdrive, 6GB RAM, and a Geforce 6600.

Anyway, my question was where can I obtain ASD 2.6.3 and AHT 2.5.2 to test everything to make sure it's all funtional 100%? Also, I tried googling it, but I cant seem to find out which is the last version of CHUD for the quad G5 that can use NAP mode like my MDD.

Help would be fantastic! Thanks guys!