Software Deployment

Assuming they are seprate products and MSI's, you can call the MSI inside a MSI, this is a nested installer. But I would not recommend doing this as it makes it more complecated then it needs to be, also buy doing this you take away the advanatge of the reporting in ESD's like SCCM, KACE atc. When a MSI runs it reports back to the server on how it went, weather it failed, pending a reboot etc.

If you can manage the deployment in the ESD, great! If not, use a script with some nice logic and error trapping/reporting.

Good luck!