On future versions of W7T you can select the wusa.exe in system32 and it will work like normal i.e. it wont copy wusa.exe to dvd root and after install it will use "%Systemroot%\\system32\\Wusa.exe". Same rule applies for anything in system32 folder.
I've just used your directory code as the file one is pretty much the same. It has it's own submenu because you can only have one "runas" section. Giving Take Ownership allows the context menu to keep Run as Administrator and allow the Take Ownership to run using admin privileges.
Windows 7 Toolkit should work on Win7 and Win8, although i probably will have to rename it lol. I saw the keynotes.... not planning on making it metro friendly lol.
Lol Just a reminder that tomorrow is my last day before i move, so hopefully there will be a release tomorrow. However there will not be many changes, just a Windows 8 tweak.