I have updated the Option Type Feature mod written by Chandra Roukema and packaged it for easy installation into MS2-MAX v1.5.5.
Follow the instructions in the package. The overwrite install should only be done on a stock MS2-MAX. If you have hacked in your own mods, use a file compare tool to see where the changes are.
If you are using a stock MS2-MAX, just upload the files, overwriting the existing files. Edit your configure.php according to the instructions and run the 2 included sql files on your database.
The whole install takes about 5-15 minutes, depending on your ablilites.
Enjoy! The zip is attached below.