Question about 3.3 downgrade to 2.2 (n00b)

[Shamingo]

I installed the 3.3 aku recently and I'm very knowledgeable about computers and the like and was just messing around with it. I then realized why I shouldn't have yesterday on a business trip when I realized the BT DUN profile was removed. I'm looking for a copy of the 2.2 AKU and also wondering if I should go with the original Sprint rom or the hacked one? Do they both contain the BT DUN profile? Thanks guys.