Win Toolkit can integrate registry files, that's it? Just integrate desktopcontextmenu.reg then just put files on installation folder that's easy. Anyway have you experiencing huge slow downs when using IE10 when you installed it on non-default directory of explorer.exe? I experience it on older version where I installed it on different directory, not overwriting the windows 8 explorer.exe. Also the installer hangs when you just installed it on %WINDIR%, it's too hassle to overwrite ownership everytime.