wireless G1 tether with rooted phone

UGGGG. My phone I bought last wk was tethered perfectly to internet until I deleted some apps yesterday, and screwed something up.

Does anyone know how to give me instructions on how to retether it! the wireless tether button on phone still connects to my computer, but there's no actual connection.

Thank you soooo much. If someone calls me and walks me through it I'll take you to dinner or something!

415 999-6401