Extra, duplicate Applications Folders--which to trash and how?
The problem I'm having is a discrepancy between the programs in my main HD Folder and in my Home Folder. Besides taking up space and slowing down things, it leads to curious behavior, such as: 1. the new iTunes (10) downloading to my Mac HD but not to my Home Folder, resulting in icons for both programs depending on which of the 4 folders I click on; 2. Again, depending on which of the 4 Applications icons I access in my Finder, the identical program will sometimes open in the dock where it's already sitting (as I prefer) and at other times will open as a new, heretofore unused but identical program at the far right side of the dock, just to the left of the Stacks dividing line.
In each of the 4 cases the program is followed by a size rather than "Alias" (which I assume is automatic if it's not a duplicate, separate program). So my questions come down to: First, aside from keeping the Applications folder on "Mac HD," is it "safe" to delete/trash the others? All 3, or just 1 or 2? How best determine which is expendable? Second, what's the best way to remove the duplicate or "bad" Apps folders and programs and then replace them with identical aliases? The trash basket appears to require literally days for elimination. I have the X.6 install disc as well as Tech Tools and some other repair discs, should they be fit for the task.
iMac 2.4 GHz Intel, Mac OS X (10.6.4)