Ultrashot is the main-developer behind the Dynamics Custom ROM series for Windows Phone. Recently he has release a new version of his ROM, which is based on Windows Phone 7.8 RTM and his new Full Unlock v4 which has a lot of new features:

• Native application support.
• Selective root access for applications alongside with possibility to open full access to system for all applications altogether.
• Root access usage notifications.
• Enhanced security.

He has now released Full Unlock v4 as separate package, available for other ROM chiefs. Some other notes:

• That's a squeezed release - some registry entries were removed to reduce a number of dependencies.
• Full Unlock v4.0 is available for all, but all the rest from Dynamics 2.0 and derivatives is still prohibited. v1.21 stuff is allowed to use.

You can download the Full Unlock v4 package from this XDA thread.