You should be able to use the same page types for a lot of he themes. I dont think you could do this, but if you wanted you could attach a prefix to the page types- ie theme1_two_column

Well if you pick a page type that is not for a certain theme you will be using the default.php template.

You could do what 12345j suggested but that can become even more chaotic.

-Thomas

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c5bundle - Launches Jan. 1/2011
http://c5bundle.net

Yeah, this is a problem when you get a bunch of page types. I don't think there is a way to do this, although it would be nice. I was thinking even if there was an option to change the page type selection slider to a simple dropdown menu that would be really helpful (then you could prefix the page type names and they would show up in the list grouped together).
Wish I had a better answer for you in the meantime :(

dropdown sound good enough, but for the time being ... let there be chaos :)

and... I could always try to clean up my mess a bit :)

thank you all :)

You could add some logic to elements/collection_add.php to display page types based on theme names. There is a foreach in there where a list gest generated for the page type selection.