Hey everyone, I need some help!

I am enjoying my new unlocked iPhone. It is everything I hoped it would be. I have installed some proggies from iBrickr and all seems fine. I just can't set up my WAP for the carrier I am with now. I am on Viaero in the midwest. It looks like I need access to the "advanced" setting in the Edge setup. It is not tapable at present. This is the info I need set up:

Gateway IP 1:
Port 1: 9201
GPRS APN: wap.vedge.com
Proxy Server:
Port: 9401

MMS Gateway Address:
MMSC Port Number: 9201

I gues iphones don't use mms, so I think I just need a way to put in that proxy? Is there a way to enable the "advanced" setting in the Edge settings?