Sure, but you would have to change the mission file, server files and add back all CC functions to those files. Or you can wait for the next version that supports 1.8.1 and will have fixed some issues with supporting it.
Plus, the beta patch 112555 is not stable it has some problems to it.
V6.0 was just released, and I am already working on the next version. I have no release date set, and befpre it's officially released it will be released to "Supporters" and higher rank on my website as a Pre-Release for testing. When stable it will go public.