I know many people are laughing at me reading the title of this question, but truly, I want to know if it is possible. The changes and the upgrades to mental ray… I don’t need that. In fact, the mental ray renderer in 3ds max 2009 64bit renders quite faster than mental ray in 3ds max 2011 64bit and even 2012.
I like the other updates to Max like CAT, graphite etc. I am still using polyboost and CAT as plugin in 3ds Max 2009.
So,… just tell me if its possible to use the old mental ray in new max or..... is there any way to make the new mental ray render as fast as it did in 3ds max 2009? (tasted many many many scenes before I said such a thing! Every time the newer mental ray gave 30% slower results.)

3ds max 2009 forever
Core i7 920 @ 2.67 GHz
16 GB RAM
NVidia GTS 250 (1 GB)
Windows 7 professional 64 bit