A variety of ways to accomplish it. Here's what I did.
unrevoked3 recovery reflash tool, v3.32
2. Liberated Aria Froyo FR008 (Keeps HTC Sense)
ROM: Liberated Aria Froyo Series FR008 12/13/2010 **Fully working OC Kernel** - xda-developers
Alternately, you could consider CyanogenMod, which does not retain HTC Sense
Originally Posted by sniper8752
I am thinking about updating my rooted aria to firmware 2.2. can i do this? is there a root for 2.2? i heard that with this new firmware, you can actually now install programs on your sd card. my internal memory is full, and i can't even download e-mails now.