I guaranty you I never had to reset my BIOS or any other problem in nearly one year of dual SL / ML on the same disk.

Though I don’t know exactly what Chimera does to the BIOS (if 'she' does anything...

), I believe it’s rather 10.9 that writes something there as if it were the P-RAM of a real Mac (hence CMOS errors).
To my understanding, the process is: Multibeast writes something (DSDT? or the result of DSDT settings?) in the boot sector to tell the pc what is the first file to run and maybe basic settings, then the file named ‘boot’ is run, it reads the parameters in the Extra folder (org.chameleon.Boot.plist and maybe DSDT.aml — I should try to throw it away to see if it’s needed every time...

) and when everything is ok to trick OSX, it is run as if in a normal Mac, plus the needed kexts to deal with the differences.
I may be wrong in some detail, but I’m pretty sure the overall picture is there.
(actually, I haven't found anywhere a clear explanation of the process, that's what's missing, in my opinion)
As for destroying your pc, are you sure it's possible to write something somewhere that can't be reset?

I'd be surprised MB and that DSDT thing could go so deep in the machine, but I'm not a PC specialist, I confess...
