[Jailbreak](Updated)Jailbreak Released for iOS 4 Devices Including the iPhone 4

I have a 3gs 3.13 with spirit jalbroken and all SHSH on file..
Is a MC137LL with 5.12.01 and  on the back it says A1303B..
can I update trough iTunes to 4 and is it untethered..means can I turn off my iPhone without have it plugin to iTunes all the time..

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how do I drag and drop my debs and ipas to my desktop for later reinstall from the iphones root…

pl help thnx