I think the OP is referring to 2 different things.
A kitchen is something used to update your ROM, which, essentially, upgrades your operating system. ROM images are basically what your device looks like after a hard reset or just out of the box. However, it will always be Windows Mobile, not the iPhone operating system.
The iPhone stuff is most likely an iPhone theme, which you can find many in the Themes forum.
Browse, read, and search these forums for answers...
Pocket PC Themes forum.
HTC Titan (Sprint Mogul, XV6800)
Upgrades forum.