Thanks. I have already extracted the file from Dell's site, but the contents do not appear to be driver (.INF) files that MDT will be able to work with in order to import.
When I extract the CAB file from the Enterprise download site there will be a chipset folder and inside this will be multiple folders and each one contains chipset files. .INF, .DLL, .SYS, .CAT, etc. But when you get the Chipset driver from the Support site you just get that big .EXE which when I run with "/?" doesn't share any secrets how to unpack.