dude I was just using php 4 and 5 as examples, but believe me dll's for 5.2.5 are most likely not the same as 5.2.6 as they are for 4 and 5 I presume because it even says so on the php site that you must not mix up dll's and whatnot from different versions of php.
Now I have Successfully upgraded phpmyadmin to the latest build and also mercury mail and MySQL. All I have left to do is PHP and then eacceleartor and zend. I think Browsecap is the same and also DB but I will be reading more on the net which is what I suggest you do.
EDIT: Not to mention I have also changed perl to ActiveState and that also is working 100%
Now fair enough I am not a pro but I am not a noob neither and my first post did say that I had read these facts about php from a php site so don't dismiss my comments like you did. just remember 33 views and I was the one to answer you.
EDIT 2: come to think of it doesn't your xampp folder have a php folder and then a php 4 folder inside that folder ? and whats inside that php4 folder ? dll's and whatnot ? for ? php4 and not php5 ?
lol top marks for winding me up this evening anyway , I hope you sort your problem out and I'll let you know when I have done mine k.