How do i downgrade OS X 10.6.7

I am having serious conflicts with Adobe Acrobat Pro 9.4.3
From what I can tell the best way to solve this is to downgrade snow leopard 10.6.7
Can I do this if I have the original system disks?
And does this mean I will have to wipe the drive and reinstall everything?

Can I do this if I have the original system disks?
If they are Snow Leopard install disks, yes.
And does this mean I will have to wipe the drive and reinstall everything?
No. Unless you actually choose Erase and Install, Snow Leopard replaces the system files. So when it is finished, you will be back to whatever version of SL is on your disks. All of your third party apps and other data will still be on the hard drive. After that, install the 10.6.6 Combo updater, and any others that may appear in Software Update except for the 10.6.7 delta updater.
And of course, make a full backup first in case something goes amiss.

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