Jailbreak my iPhone 3G on OS 4.0 HELP PLEASE!?

I currently have a jailbroken iPhone 3G on 3.1.3 with Sn0wbreeze. I snowbreeze tried to use 2.0 to update my OS to 4.0 – I went through the whole process of how the new system Operating at 4.0 Sn0wbreeze and once finished I put my phone in recovery mode (with Snowflake USB) and shift + restore in iTunes. When he goes through the process of restoring my screen on the iphone emergency. I also tried to restore using DFU mode, but I got the error 1600. I could go back and restore my previous 3.1.3 IPSW Sn0breeze. All I'm doing wrong? But thank you Steve-I no 4.0 or 4.1 on the phone now. I'm on 3.1.3, I have the phone unlocked, so I do not think I can update 4.1. Will Limerain update my OS? Or just jailbreak OS I am?

limera1n not work for your version. and do not upgrade to 4.1 because it is not unlock yet. You can use the Pwnage tool, but you need a Mac. also, you can try http://bit.ly/coMhz4 but it is not free

[SNOWBREEZE 1.8] save your SHSH and reduce 1600 error jailbreak your iphone 4G 3Gs ios4 and ios4.0.1