Thanks to all ...especially to Ermac -- added 10.8 support to chameleon 2.1svn (rev 1820)
and Verdant -- beautiful OS X Lion installation tutorial and manual for nForce Motherboards..
1) Download OS X Mountain Lion from Mac Dev Center. (must have access to Mac Developer Program)
2) Download the latest revision of chameleon boot loader i.e. chameleon r2014
3) Installation procedure remains same as Lion. Please follow verdant's OS X Lion installation procedure.
Use the same kexts from your existing Lion. I used FakeSMC 4.0.
4) Finally, I am writing this post from my OS X Mountain Lion... I Hope all will have a successful installation without Kernel Panics..
Sound: AppleHDA.kext(10.6.2).kext + LegacyHDA.kext + DSDT patch (VCH888's ALC889A/885 audio isn't working on nForce boards...working on it.. )