- there are a lot of usefull options!
- seems to be working well
- including 2 Color Gradients!
After some coding and exploring the result is almost clear:
i could use this in my applications, since the IgaUtilities won't work with Windows 7.
There are 3 Questions left
- clicking on the minus sign in the Folder Tree Jumps one Folder up instead of closing the Folder. See Picture left side
- wich Keys are used to close a folder? up & down work as expected but will also open the folder with subfolders. in windows explorer the left and right key will allow quick navigation.
- is there a way to Not show the File Panel? i could hide it behind some rectangle of course... see picture right

Nice Work!
cheers
Scherzkeks