Firstly couldn't find a need instructions for WinPwn usage, so wasted hours of time trying and testing.

I wanted to use custom logo, but nowhere winpwn warned that you cannot use jpg. One of the forums says that logos must be png with less than 100K & 320*480 size and alpa,transparancy (what is alpa?).

Being windows user I installed photoELF and created a png file, but still when the iPhone boots no logo, just blank during boot.

I think if possible can "cmw" suggest how to create Custom logos else place few nice logs in the winpwn package to choose from.