Install both PHP53 and PHP54 with dotdeb on squeeze ?

[Grégoire COUTANT <gregoire.coutant@gmail.com>]

Hi all,
Do you know a way to install both version of PHP (5.3 and 5.4) on debian 
squeeze ?
I actually use dotdeb and php-fpm and I don't see any doc on the web 
about dotdeb and two PHP version.

Thanks a lot for your help

Greg