#3 - Nov. 26, 2008, 4:42 p.m.
From Technical Support we cannot directly assist with addons, I can only specify the directory where they need to be installed to function, which would be:
Vista - C:\Users\Public\Games\World of Warcraft\Interface\AddOns
XP - C:\Program Files\World of Warcraft\Interface\AddOns
If you extract the files into those directories correctly (which are the default locations for the game) you should get the button and addons loaded.