If you have a favourite theme and want to be able to apply it to the newest nightly CM6 ROM for your Hero, without having to go through porting it manually, you might want to take a look at One Click Theme Injector.
One Click Theme Injector is a tool developed by XDA forum member ASimmons, which takes your favourite theme and ‘injects’ it into your favourite ROM.
Simply grab your favourite theme, grab the newest nightly, place them in the one click folder and double click the script. The tool will prompt for the name of the theme and ROM and output a “themed – <nameofyourrom>.zip which can then be flashed to your system.
As the script can only inject what it can find, it won’t inject any apks that are in the theme that aren’t in the ROM.
To download the tool and for more information including detailed instructions, check out the forum thread._________