RVM Integrator is not just an integrator. It's main purpose is to actually slipstream hotfixes and third party utilities into your Windows install disks. Integrating is simply a way to attatch setup files into your windows disk and have them install at a specific moment during Windows setup. Slipstreaming will actually overwrite older files and place itself directly into the windows installation.
If an addon was adding a path with a space to the [WinntDirectories] section of txtsetup.sif without quotes surronding it, it would cause an issue. So now the integrator will make sure if it has any spaces that it will be surrounded with quotes.
Tools and Utilities
Product page: here