> My company is having 3 new products. Three of them need to have the SAME company (client) setting such as company name, database path and etc.
> How should I design it, in order my future client can use only one set setting if he/she install all three products into the same machine?
> Should I seperate it into another EXE, and check for this EXE when application startup. If not available, will install.?

Hi, John.

I don't understand the question very well.
Do you want the three applications to share the same configuration and data files? Do you have same settings hard-coded into the executable?

Tell me a little more and I'd be glad trying to help.