This is known to work in Windows 7 Beta, but I'm sure it works on any build.
I'm currently backing up my stuff to put the PC in RAID 0 and to welcome the RC, and I wanted the stock wallpapers. Well, it's in C:\Windows\Globalization\MCT\MCT-US. Well, in order to get that up, pop the folder option to show hidden file and hiddent system files.
Well, to my surprise, I found MCT-AU, CA, GB, US, ZA and they all have wallpapers in them. Go fetch hidden wallpapers!
Oh yeah, AU, CA, ZA are the same.
I'm currently backing up my stuff to put the PC in RAID 0 and to welcome the RC, and I wanted the stock wallpapers. Well, it's in C:\Windows\Globalization\MCT\MCT-US. Well, in order to get that up, pop the folder option to show hidden file and hiddent system files.
Well, to my surprise, I found MCT-AU, CA, GB, US, ZA and they all have wallpapers in them. Go fetch hidden wallpapers!
Oh yeah, AU, CA, ZA are the same.