CustomROM with long press back button and menu button

Hi,
I've been looking at a few custom ROMs - Omni/Paranoid Android.

Do any of them allow for customising a long press of the back button and menu button? I couldn't see.

I'd like, for example, long press back button to goto HOME page - and long press menu button to goto task manager.

If not, any good apps or other ROMS?

Thanks,
Alex