Crystal Reports Distribution

I have a couple of Visual Basic 6 projects, one of which uses CRViewer and v 9 reports (which I did not add) and another has CRViewer and v XI reports (which I did add).  The first one works, and it works using Inno Setup Compiler to install a few dlls.  The same approach does not work for the second one (I get the famous "Run-time error '20728'") though it works fine on my machine.

I've never created an MSI, and when I use MakeMsi to include the CR merge modules it gives me a "Rex code called Error()" message which -- according to their support group (http://tech.groups.yahoo.com/group/makemsi/message/1745) -- means I have to "use Orca to debug".

All this seems like a lot of work if it works in another project.  I don't have CR v 9, but I have v 10.  Doesn't v 10 require merge modules?  Should v 9?  Why do I need merge modules?  All the machines mentioned are Windows XP.  I think I just need to be pointed in the right direction.

Thanks in advance