Hi,
I've sent you an email with an import file derived from your CSV and the latest version of ExportImportAltKey.vbs. You should be able to place both files on the desktop, then drag and drop the text file onto the script and follow the prompts.
First there should be prompt confirming that you want to import metadata for 22,339 items. Assuming you click OK the script will next prompt that is going to scan your tracks looking for alternate keys and that this will take some time. Click OK and wait. It has been taking about a minute to scan 10,000 tracks which feels like forever! There is the option to have a progress bar here but it requires tweaking Windows security settings to get it to show, and ultimately slows down the process. Details on my scripts page if you are interested.
Next you should get a prompt indicating the first change that the script proposes to make. For you that should be that it will change the rating of O:\Music\Music\30 Seconds To Mars\This Is War\01 Escape.mp3 from 0 to 40 (0 stars to 2 stars). Click Yes to accept the change and preview the next change, click No to stop getting prompts and let the changes take place automatically, or click Cancel to quit the script.
I'd recommend you make a backup copy of your iTunes Library.itl (while iTunes is closed) before you try to use the script.
Assuming the import is successful it should replace the plays, played date, skips, skipped date, and ratings where those details were recorded in the CSV.
Let me know if you have any problems using the script, or you don't get the email. (Check your spam.)
tt2