Sending PMs from MySQL

[Kayvin]

Alrighty, here's my question:

My vB install shares a database with a Notepad-written PHP system, and I would like to get it to send vBulletin PMs... without hacking/modding vB at all. I basically just want it to be able to insert the SQL queries directly.

Now, some things vB does, and data it stores, is fairly easy to figure out how it's stored, so I'm able to get my program to manipulate and use that data, however, the PM tables I get fairly lost in, so I was wondering if anyone knew how one would go about doing this.