They changed the format of PS2009 from previous. With 2009 I had issues where it wanted to install things I didn't want, there was no way to turn things off. (With 2008 the user had total control of what was installed.) For example, PS2009 contains an older version of Starter and it angered me that it would install it, then I'd have to uninstall it before putting on the latest version.
I contacted the hotline and after they went to Germany I was told that yes, it had changed and No, you don't have control of these things. I resolved it on my own - You can browse the contents and install specific things. Of course this completely defeats the purpose of Premium Studio, right?
The hotline also said PS2009 was the last of it, there were no plans to go forward with this product.