Ok, try this download
It is a DokWiki On A Stick Version which I downloaded May 17, 2015:
DokuWiki '2014-09-29d Hrun'
MicroApache (Windows) Apache 2.4.7, PHP 5.4.25, GD2 and SQLite
That means this version is newer than the newest of the listed under Old Releases. And it works under WinXP (at least with me).
Be aware that it not allows you to update to Greebo (because of the PHP version).
HTH - Michael Sy.