Can't delete old iTunes after Mountain Lion install

Question

I updated my Macbook Pro (late 2008 version) to Mountain Lion and everything was working great until I tried to open iTunes from the Dock and got a message about it being unable to open, investigated the Applications folder and discovered that I now have two versions of iTunes, 10.6.3 and 10.7. 10.6.3 is in the applications folder but 10.7 is in a sub-folder within Applications. In the past I've organized apps in folders according to subject - home office, internet, graphics, games, etc., and have had no problem deleting old versions of Apple apps after system updates by either dragging them to the trash or dragging the updated version into the applicable folder and using the "replace" function. Now I cannot move either the new or old version of iTunes to trash or between folders. I'm getting a message "iTunes cannot be modified or deleted because it's required by OS X".. I've searched these forums and googled the question, and the only solutions I've found have addressed Windows PCs.
From checking the "Get info" panel I can tell that the 10.6.3 version was installed prior to installing Mountain Lion, and 10.7 appears to have been installed either with Mountain Lion itself or in a system update shortly thereafter. I tried unlocking 10.6.3 in the Get Info panel, but that didn't allow me to move 10.6.3 to the trash.
Thanks for any help.

Answer 1

Sure, but its the best you learn how to use the terminal. OS X is Unix and the most advanced tasks can't be done in the graphical enviroment:
1. Open Terminal (You should startet in your "home" directory, this is the default)
2. Type: mdls /Applications/iTunes.app (This will output a lot of information)
3. Look for the last keyword "kMDItemVersion", it should show the program version (e.g. "10.7")
4. From now on what to do depends on the position of the iTunes version you want to delete. If this is the most recent version you will leave this file alone. If this is an older version of iTunes you will want to delete it. So there is a decision to make.
4a. Leave this file
or
4b. Delete this file with: rm -r /Applications/iTunes.app (maybe the permissions don't allow this to do, I could not test it)
5. After that you could use the finder to move your regular iTunes version to your desired position
6. If you most recent version is in an other directory, e.g. /Applications/Music/iTunes.app, you have to do the steps above with this path
It makes sense to locate first the iTunes version you want to delete. You can get this information with the showed mdls command or with the information dialog of Finder. Click in Finder the particular iTunes icon once, so it is selected, show the information dialog (cmd+i).