Trying to install Yafaray

I have downloaded Blender 2.49b and Yafaray 0.1.1. When installing Yafaray it asks for the Blender scripts directory, but when i select it, it comes back with “invalid directory”. I reckon this is because blender isnt installed on the system, it’s just in a folder on my desktop is if it was some sort of crackware or something. How do i install it? The first Blender I ever got (2.61) installed normally and works perfectly. Ever since then every Blender I D/L comes in a ‘mobile’ version. Which means i can never install addons properly, and im left wondering how windows manages to work the cache/temp files correctly.

To do, what?

http://www.yafaray.org/documentation/install

Do you need Yafaray 0.1.1 ? The 0.1.2 is available for Blender 2.6x from graphicall.org. Just enter Yafaray in the search box:-
http://graphicall.org/?keywords=yafaray