I am using redsnow to make custom 5.0 fimware without upgrading baseband. Ok I read what you posted but do not understand what they are saying.are you using pwnagetools Sn0wbreeze what firmware?
Removed BBFW file in the firmware folder of an unzipped IPSW. Can also be used to prevent a baseband update. The device is bootable, if you set the auto-boot to true or use TinyUmbrella and use "Kick Device out of Recovery".
You are trying to update to a custom firmware from PwnageTool 4.1+. You always have to go into DFU mode and restore from there.
I have my SHSH saved for 5.0 thought and am using tiny umbrella. I thought this would allow me to use 5.0I think the problem is that apple is not signing 5.0 anymore. You have to use 5.0.1, which redsnow can't support.
The tutorials for 5.0.1 which suggest using redsnow with 5.0 is only if you already have 5.0.1 loaded onto the iPhone. Redsnow uses 5.0 to jailbreak the 5.0.1 already on your phone. However, since you want to preserve your baseband, you have to make a custom 5.0.1 build. Redsn0w cannot do this. I think only sn0wbreeze supports 5.0.1 and sn0wbreeze only runs on windows.
Please add an "I think" to each sentence above.
I'm in the same position as you. I also was unable to get sn0wbreeze running on my windows partition.