MyBB Community Forums

Can anyone tell me how to install coloranks for my forum? I downloaded it then uploaded the "upload" file to my forum root (public_html) but when i try to add the image it doesnt change...if someone could install it for me that works too.
coloranks @ community.mybb.com/thread-46371.html

Images should go in /images/groupimages/english. Rename them so they overwrite the current images.

Thanks for the quick reply