Combining slides with multiple master slides using VBS

Hello,

I have an application in which we need to have users upload individual
slides to our server. Then we must combine the slides together into a single
presentation. We are unable to handle multiple master slides.

We are using visual basic script from ColdFusion. Here is the code we are
using:
Set oPPTApp = CreateObject("PowerPoint.Application")

Set oPPTPres = oPPTApp.Presentations.Open("c://test7.ppt", , , False)

oPPTPres.Slides.InsertFromFile "C://test2.ppt", oPPTPres.Slides.Count

oPPTPres.SaveAs "C://final.ppt"

I'm looking for the command to check the master slide, add the master slide
to our presentation, and assign that master to the appropriate slide.

Any help will be greatly appreciated.

Thanks,

Brandon