I'll try to make things a little clearer for 64-bit users, since (no offense caeszar) the original instructions are pretty unclear.
1: Take ownership of the files C:\Windows\SysWOW64\explorerframe.dll, C:\Windows\explorer.exe, and C:\Windows\System32\explorerframe.dll.
2: Backup the same files.
3: Overwrite these files with the files from the 64 folder of the visual style pack (I'm not sure if explorer.exe should be copied into system32 as well, but I don't believe so). It's easiest -if you know how- to do this by closing explorer, and using command prompt run in administrator mode to copy the files over, or you can try to do it manually.
4: Restart explorer/reboot the computer, and it should be done.
A lot of the confusion (for me at least) was that I was trying to copy the files from the 32 folder into the system32 folder, and that caused some rather serious problems. You in fact have to use the explorerframe from the 64 folder again to copy into the system32 folder. After that, you should be done. Good luck to you all.