At the moment there are only PHP 5.3.1 and PHP 5.3.0 addons for PHP 5.3.X version at official Wampserver website. It's a bit strange that only these two addons exists. Maybe there are more but just links to them are not added? I can't find them anywhere.
I need to test apc, xcache and memcache on my wamp installation. All these extensions require different PHP versions. So I essentially need the ability to have various versions of PHP.
Maybe someone knows a good tutorial where it is shown how to add PHP version manually to WampServer? As there are so little addons for PHP versions, Wampserver developers could post an official tutorial how to manually add new PHP version by yourself. That's just an idea.