Question about reinstalling v10.7 Lion on iMac

Last night I ran into trouble with some kext errors caused by permission changes I made (learned my lesson on that one!).
I ended up getting the grey screen that wouldn't do anything, so I turned off the Mac, then turned it back on again and entered the Lion Recovery module.
I selected reinstall Mac OS X, then I was taken to a screen with 2 choices - Macintosh HD or Recovery HD.  I believe the Recovery HD was locked, so i (mistakenly?) selected the Macintosh HD partition.
Will this create a problem, or was it the proper partition for reinstalling the OS? 
Everything seems to be working fine, with no more kext errors, but I'd like to avoid a potential conflict if the OS isn't installed in the proper partition.
Any assistance is appreciated.
Paul

Only if they were system kexts. Reinstalling has no impact on third-party kexts unless you first erased the drive.
If the problem was simply permissions on system files then using Disk Utility to repair permissions should fix that.

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