I found that skin when I searched WC also, but naming is literal with WB so I dismissed it as not the same as "Terminator_3_Visual_Style".
I D/L'd the skin & took a look - naming is indeed the problem I believe.
The .uis file is named "Terminator3.uis" & all the image designations in the .uis file use the path "Terminator3\".
The .uis file has this entry in the [TitlebarSkin] section: "SkinName=Official Terminator 3 Windows Style".
WB uses the "SkinName=" entry to name the skin folder, which in this case would cause the path to the images to be nonexistent. If you still have the .wba download file, open it with WinZip, then open the Terminator3.uis file with Notepad from within the WinZip dialog. Change the "SkinName=" entry to "SkinName=Terminator3". Save the .uis file, close WinZip. Delete the old folder named "Official Terminator 3 Windows Style" and then reinstall the skin by double-clicking the .wba file or using the Install From Disk function in WB Config.
That "should" fix it. Please post back if that fails.