Why the hell my boss gonna 'pimp me out' to another business for a project he's working on with them. Basically introduced me to them over email with a few days deadline. Still can't get all the details I need.

Happens a lot during crunch times, get an extra developer in last minute, which rarely works unless that new developer either:
1) Has an idea on how to solve a *specific* problem, or
2) Increase development pace

Usually for me its the first one, for you it might be the second but you havent properly introduced to it...

good luck man