Deleting Unnecessary iTunes and Quicktime Files

Question

Having installed and subsequently updated iTunes and Quicktime (with both programs being parts of one update "package"), I believe I may have many unnecessary files on my machine which Apple's installation and updating processes did not throw out or which are created when the programs are used but not thrown out after usage.
Can you tell me if I can safely delete the files in the following folders?
In the location C:\documents and settings\all users\application data\apple computer\installer cache\, the files in the following folders, which together use up 92MB of disk space: Apple Software Update 1.0.2.1, iTunes 7.0.2.16, iTunes 7.1.0.59, QuickTime 7.1.5.120.
In location C:\documents and settings\myname\local settings\application data\apple computer\quicktime\downloads\, the set of folders and subfolders which collectively contain 37MB of files with the extension .qtch.
Thanks.

Answer 1

Thanks for your reply, but what you're referring to has absolutely nothing to do with the problem I described in my post. You described how to change the display language WITHIN iTunes. My problem is the target and name of the start menu shortcut "Om iTunes", which on my PC opens a Swedish rtf file. Changing the iTunes language does not change the name and/or target of the shortcut.
The problem is that the iTunes (and QuickTime) installers assume I understand Swedish if my English Windows XP PC is configured to use Swedish date, time and currency formats. This is not necessarily the case, as I tried to explain in my original post.