ok so I checked out the link provided, thanks by the way. I'm sure ur talking about where its says update for sprint ppc6700 right? I looked over it and that's just the rom upgrade. Note this does have to be done to use push mail. I have written a tutorial on upgrading the rom, and its a sticky. If you haven't upgraded yet, I highly recommend it. It adds a lot of features, including direct push capablities, voice dial program, zip program, and more. Hope this helps.
~Mike