Using Excel to merge 2 or more PDF documents Into 1 PDF Document

I want to create a simple Excel form that allows a user to browse for 2 or more PDF files located on the desktop, and then merge them into one PDF document. It would look something like this:

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File 1: [Browse]
File 2: [Browse]
File 3: [Browse]
File 4: [Browse]
File 5: [Browse]

Name of New Document: [User Defined]

[Submit Button]

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The name of the new PDF document would be user defined, but would automatically save to the desktop when "Submit" is clicked.
It would also be appropriate for there to be VBA that would also automatically delete from the desktop the original files that were merged.

Any assistance with this is greatly appreciated!