From a programmers perspective,it is not that hard to accomplish and I know of 1-2 DLLs that support MySQL connection in DBPro.One would be CattleRustler's Database DLL,which could be found here -
http://forum.thegamecreators.com/?m=forum_view&t=145547&b=18
You'd need to download the latest source code of the FPS Creator engine and modify it yourself,then re-compile it into FPSC-Game.exe and replace your original one.
You'll need the DBPro extras as well as DarkAI(you need to purchase it) in order to compile the latest source.
Since FPS Creator uses an internal scripting "language",you'd have to code a few functions(cases) to handle the connection and data send/request to your Database server.
In short,you'd want to add extra FPI(scripting language) commands to FPS Creator and then use them inside a custom script to initiate a Database connection and send data to it (Say if a player enter's a trigger zone,then connect to database and send playtime for example)
This is a very brief description of how it would work,but I hope you get the idea.

PC Specs:Windows 7 Ultimate 64-bit,Intel Core i7 960 @ 3.20GHz,NVIDIA GeForce GTX 480,12GB RAM,2x Western Digital 997GB HDD