php 5.2 on debian wheezy

[Roland RoLaNd]

All,
An application we're using is in need for php5.2 and we lack the time to make 
it work with the latest version.
google search shows a lot of 5.3 to 5.2 downgrade for squeeze but not for 
wheezy naturally.
May i ask if anyone has done so recently, and if you could provide a how to?
Thanks