.ppt to a new .pot

[ABC]

I'm using powerPoint2007, but always save as "older format".

I did tens of new slides (.ppt), but now I made my very first .pot. Is there
any way to transfer my .ppt-file using the new .pot-slide desing - bacgroud
photo and new font and footer color? Or do I really have to made the changes
to every single slides???

Thanks for any help.

 

[ABC]

Font and footer color are still original, when I start a new slide, what I
actually want to change. Backround picture stays in a new slide.

So in a version 2007 I found out, that I can change the footer font color
now.