Using InstallShield 2011, how can one create an installation to add files to a previously installed program?

I've written an add-in to an existing program. I want to create an installation which copies files to a sub-folder within the previously installed program folder. The installation path of the existing program is available in the registry.

• Can one do this using InstallShield 2011?
• If so, ple开发者_C百科ase tell me how, or give me a link to a document which explains how.

Thanks, Stephen

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Create a new QuickPatch project, and use the MSI from the previous installation.