[Johnny got his gun]

OK fixing the plugin for IPB was very easy and works great, although I didn't bother trying to support the PM part. Reason is I could only get ahold of a encrypted/precompiled PHP scripts to run my test forum. That's why I can't do forum modding instructions for IPB either.
Some more testing and then I will release this.
If you need to have this for your forum that isn't anyone of phpbb or IPB, you will have to supply me with the data structure of the forum's SQL data tables. Preferrably the whole thing, but most important is the users/members table, and maybe the tables holding PM messages.