[wix-users] Saying hello - Archives?

[Charles Gallo [9Dots Management]]

Hi,
I'm a new subscriber to the list, and was looking to see if there is an archive for the list (could not find them at lists.wixtoolset.org ) before I go asking newbie questions that have probably been asked before.

And speaking of newbie questions:
I think I have my first install working the way I want after reading the entire tutorials at Firegiant

But now I need a bit of a strange installer, and was wondering if WiX is what I should be using:

Due to some decisions made by my predecessors, and the fact that I'm working with a TON of Excel Macro sheets, I need to install TWO versions of a DLL in the GAC (let's call them 1.0 and 1.3) - as "old" spreadsheets (some 10 years old) use 1.0, some use 1.3

So, I need an installer that will preferably silently install BOTH versions of the DLL in the GAC (if I need to, I can build one for each version) - but here is the joke - there is no application to install!! (this is going out as a repair - the installer I built does a good job installing 1.3,  but old clients sometimes get new reports without an upgrade, and sometimes new clients get old reports)

Is there a way to
1)Install BOTH versions of the DLL (they have the same name) in the GAC (I think I see how to do that)
2)Not actually put them in the "Programs and features"

Thanks
Charlie