If I'd realised how little had to be changed I would have done this weeks ago but that's how it goes...
The most recent version of psj poolserverj-0.3.0.07.MM.tar.gz now has scrypt support. You'll have to remove all the merged mining config options from the properties file and set POWalgorithm=scrypt
Fair warning, this is completely untested as I don't have a scryptBrix/coin client.
I'll do some testing for my private pool and get back with results. Did you use the Java implementation of scrypt by Will Glozer?