Not long ago I encountered a problem attempting to JB my iTouch 2G with Greenpoison. I kept getting an error related to USB--I think the drivers for the iTouch somehow did not get loaded when it was connected to the PC but was indeed recognized by iTunes and PC when I connected so there must have been drivers loaded.
I was using ipsw 4.1 for which I had saved SSH blogs with TU.
I then tried to use limera1n which stated it performed the JB succesfuly but it did not because it did not install Cydia.
Maybe I was mistaken thinking it was limera1n I had used. I just could not get it to work. I'll post the error message I get to to in a PM, and thanks so very much.