I've searched around and haven't found a direct answer. Using Wintoolkit 1.4.30.21 I added hotfixes/updates and everything apears to have went fine. Now I look at my Windows 7U-64 folder and see a subfolder name "Wintoolkit_Apps". What is this folder and why is it there? Should I include it when making my ISO?  Thanks!

If it's empty, just delete it. It is used with Silent Installers.

Thanks Lego!  Actually, it's not empty. It has what I guess is IE11 in it, Windows6.1-KB2603229-x64.msu,  but what happens upon installing Windows 7. Does WIntoolkit somehow guide the Windows 7 install or .....?

It runs it all at first logon, you should see a window saying what it is installing.