These should be most of the parts, listen to the recording to find out when they switch exactly.

Backstab:E Db A B/ Db B A/ E A/ Ab B

Unspoken Words:B Ebm E F#/E F# B Abm/E F# B

These are as close as I can get for now. I will keep working on getting more, and getting them better. If anyone knows any Showoff songs email them to me at punk118@yahoo.com