I taught an AutoCAD class at Canaveral Airforce Station once and the night before the class I and a couple of department guys went around and installed AutoCAD on each of the machines. The next day, when I came in the machines had been wiped and reset by software similar to what you described and I thought, ":what fresh hell is this?"
While you can't do anything about the splash screen when you launch SolidWorks-partly because it displays that while it's loading libraries, that information is stored in the registry and can be imaged from a registry file by your log-on script.
I suggest using the copy-settings wizard which will gather the current SolidWorks user settings and save them to a SLDREG file.
You can then rename the file to a .reg and image that during your logon script
I think you need to do this on you image before ghosting all the lab machines.