Relative paths

Hi to everybody.
I'm going to give you a little example: I've a folder called Folder1. In this folder there's another folder called Folder2. Whether the setup.exe file is in Folder1, I would like it installs files inside Folder2 passing over the remaining content of the directory, as using relative paths. Is it possibile to do so?

SetOutPath sets the working directory.

-Stu