How to Jailbreak Apple IPhone OS 4.0 Version

This site will show you How to Jailbreak Apple IPhone OS 4.0 Version

Links you need in order to jailbreak

IPhone 1st Gen 3.1.3 Jailboken Firmware
http://www.sendspace.com/file/rimbb2

IPhone 3G 3.1.3 Jailbroken Firmware
http://www.sendspace.com/file/u2x2t5

IPhone 3G S Jailbroken Firmware
http://www.megaupload.com/?d=GC4D8BP1

IPod Touch 1st Gen Jailbroken Firmware
http://www.megaupload.com/?d=OT0DGR2Z

IPod Touch 2nd Gen 3.1.3 Jailbroken Firmware
http://www.megaupload.com/?d=3KOIX2MZ

If for some reason that dont work try this video and the links.

FIRMWARE!!!
http://www.felixbruns.de/iPod/firmware/