Add references programmatically

we have an Access-Application which does not work on some clients, mainly because references are broken. That happens for example when you start the access application with access runtime 2007 but have office in version 2003 or 2000 installed. Functions like Left/Right/Trim etc. just stop working then.

I think the only way to fix this problem is to programmtically check which office version is installed and add the references programmatically as in these heterogenous environments we cannot control what the user has installed. Specifically I need to reference the Microsoft Office Object libraries for Excel and Word.

But I neither have the guids of all office versions nor have a clue how to check them automatically.