Why can't I different iTunes libraries from their .itl files?

[Benhermies]

I have two different iTunes libraries so i can keep certain music separate from others. To switch between them I hold down the Option key while clicking on the iTunes icon, which lets me choose which library to open. Since I'm just choosing the appropriate .itl file, I thought maybe I can just double click that .itl file to launch it in iTunes, but instead it always launches the last library which was opened. Can anyone explain why it does this?

 

[old-wiz]

I think what happens is OSx sees the .itl as needing iTunes so it opens iTunes with no parameters, so iTunes opens the last one used.

This is different behavior from, for example, Pages, where OSx passes a parameter to Pages to tell it to open a specific file.

They probably never provided much for multiple iTunes files. I would love it myself though.