Hi tmccoysrc,
When you merge compiled help, it's only the compiled chm that
you need to copy, not the entire project. When you click the Merge
button and select the project to merge, it asks you if you want to
copy the chm file into the current project (or something along
those lines - it's a while since I did it). This means that you can
maintain a separate help project for Product C, and simply merge
the compiled chm for Product C into both the Product A and the
Product B help projects. If you update the help for Product C, you
have to remember to copy the new chm file into the Product A and
Product B folders when you've recompiled it, but that's an easy
thing to do.
Hope this helps.
Anne