1.1 Installer With XP 64 bit

Hi guys

I've had to do a reinstall of EB, but lost the original files I used. I downloaded the new 1.1 and 1.2 installers, however the 1.1 installer is giving me the error I normally get if an exe can't work with XP 64.

Not sure if it is an issue with the installer, or whether the download was corrupted - should the 1.1 installer work on XP 64? Or will I need to find a rar that contains all the relevant files that the installer unpacks, so I can just copy them into my RTW folder? If so, where do I find this? Have searched the forum and google, but no luck so far.