MyTouch 3G Can you pass the beginning without a Data Plan [Rooting Help!!!]

[AntF]

My story is that in the past I got a myTouch 3G unlocked and the guy that gave it to me had his gmail in it and I didn't know the pass, so I just factory reset it and then i got the surprise that I NEED a data plan to be able to do the beginning screens...
So I got to a guy that fixes cellphones and he used his internet to pass through the screen...
After that it got a 2.2.1 update and I was to happy kuz now I could factory reset it and not need internet to pass it...
Then I learned about rooting and I really wanted to root my phone, so I went to a page that showed me how to root it and they told me as a first step to go back to 1.5 using a downloadable file named sappimg.nbh so I followed the instructions and downgraded it back to 1.5, BUT I need a data plan to pass the beginning screen now and now I can't take it back to the same dude as before, and sense I live in a small place called the Dominican Republic; the only data plans here are for BBs and iPhones...
So now that I finished the story, the question is...
Is there a way that i can pass the beginning screen without a data plan???
PLEASE HELP!!! I have looked up just about everything and can't even find the second downloadable update file I need to take it back to 2.2.1! PLEASE HELP!!!