iPhone HELP!! I hit "erase all content and settings" on a jailbroken 3gs

I have a 16GB Jailbroken 3GS with ios 5.1.1. I wanted to sell it so I hit "erase all content and settings". It's now stucked on the circling logo for hours. How can I bring back the 5.1.1 and jailbreak it again?
When I go to in iTunes>preferences>devices it shows that I have two backups of this phone, are they useful?
Please kindly help me with a step by step guide.
Thanks in advance.

thanks

Thanks for ur prompt reply Carlanga. I want version 5.1.1 so that I can jailbreak it again. Unfortunately couldn't find anything on iclarified.com because I'm not sure what to search for. can you be more specific please?

Carlanga said:

DFU>Restore depending on what fw you want. Find specific tutorials for it at iclarified.com GL

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Yeah, me too.