Hi!!
The RAT Plugin for Integrity is very straightforward and there shouldn't be any problem, whatsoever.
After the installation, it is necessary to configure the proper attributes/categories in order to let RAT do his job. It is very important that this attributes/categories follow exactly this configuration, because RAT won't work, otherwise.
For more details and a step-by-step guide, please find attached the Configuration guide.
Cheers!