This is complicated.
1) You got to use OldNewExplorer
2) You got to use a custom shellstyle in your theme folder
3) You can use a custom classmap or use Update ONE Resources button in WSB
I just used the custom shellstyle and custom 8.1 classmap by MrGrim found here:
http://virtualcustoms.net/showthread.php/63105-Custom-Class-Maps-for-WSB-1-5-5-6First I had to replace the ClassMap in AveApps/Windows Style Builder/Data/Win8.1 folder with the one made by Grim. I saved the default ClassMap elsewhere.
Next I opened the msstyle in WSB, tested and saved it. I reopened it and found new Parts like
Explorer & Shell > Explorer > Control Panel > ControlPanel > NavigationPane > NavigationPane Background
Explorer & Shell > Explorer > Control Panel > ControlPanel > NavigationPane > NavigationPane Shine Layer
Explorer & Shell > Explorer > Control Panel > ControlPanel > NavigationPane > NavigationPaneTop Background
Explorer & Shell > Explorer > Control Panel > ControlPanel > NavigationPane > NavigationPaneTop Shine Layer
which correspond to the bitmaps which in 7 are the images for the side and top panels in Control Panel. You can put images in here which will be referenced in the UIFILES in the custom shellstyle that you'll use with OldNew Explorer. Or you can just let them go to the backup Fonts & System Metrics > WINDOW:COLOR.
But I did put BGTYPE:ENUM > IMAGEFILE properties and values in them. I did this so they will show up if I replaced the custom ClassMap with the default one later. You HAVE TO put something in the new Parts and States or they won't show using a default ClassMap.
It's IMPORTANT to add a textcolor to the new Part and State: Explorer & Shell > Explorer > ProperTree > Navigation Text > Normal.
You can either keep WSB working with the new ClassMap or bring back the default one. If you bring back the default one then the new Parts and States will have numbers instead of names after you test, save & reopen. Like the ones above will now be
Explorer & Shell > Explorer > Control Panel > ControlPanel > NavigationPane > 1 etc.
Alternatively you can use the Update ONE Resources button in WSB as shown in this video:
http://screencast.com/t/JPY4eEF4qI haven't used this method so I can't tell you much about it.
This sounds hard but once you do it a few times it's not too bad