Change Windows 7 Explorer's Details Pane limits
Solution 1:
There is no way to change the arbitrarily low (and extremely silly) limit of 15 files imposed by Microsoft on the Details Pane in Windows 7. MultipleInvokePromptMinimum only changes the limits for the context menu.
Solution 2:
Put this in a text editor, save it as a .reg file, then apply it. this changes it from 15 to 256, but you can use whatever number you want.
Windows Registry Editor Version 5.00
; Sets maximum files allowed to be opened concurrently to 256. (Default is 15.)
; Hexadecimal.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]
"MultipleInvokePromptMinimum"=dword:00000100