In terms of requirements for MSMAPI class (d/l here):
I am not having any problems * yet *. However, I would like to be proactive :).

If I include the merge module MSMAPI32.MSM in my InstallShield Express 3.03 definitions will it automatically register MSMAPI32.OCX * or * just copy it to the hard drive and make it available to be registered manually?
Also, if a computer already has a MSMAPI32.OCX registered, is it possible that the one that I would include in the installation could break something that is already working or that the MSMAPI class would not work unless it had access to this specific version?

For the FOX.REG, is it possible to load it into the registry as is by using InstallShield Express? Again, can it break something?

TIA.