Stuck in Recovery Mode + Need to Jailbreak

[Ahnette]

I really need to use my phone tomorrow.
What can I do to jailbreak my 3GS that's in recovery mode right now?
I tried to restore it, but iTunes gave me the 1015 error.
Then I tried to jailbreak, while in recovery mode, in redsn0w, but it stopped at installing applications.

What can I do?

 

[Steven Jobson]

Restore using custom firmware. You have an upgraded baseband 6.15.00 that you conveniently didn't mention.