Get the last uploaded javas from Miran, it's called "MWM experimental javas" or something. Get the Catalog.java (sl/scripts/src/catalog.java) and test it if it compatible with MWM, if not, use the old catalog.java from 221 java pack.
How to do it ?
Open the Catalog.java and check how is made for the already existing categories.
you will need to tried a lot, if want to made catalog like that, that will be able to run MWM and 230le mods. It's not work for a day, if you got me
