There is a new set of updated environments on the newest release of Logic. The Multis are kept in a song file called
VARIOUS MULTI SETS.

This particular file is on every Logic CD but the verison may be different.
The latest version of this song data is V4.7

If you have V4.0, then you can go to the EMAGIC website and download the latest song - there are many, many additions to this new Multi setup so please check it out