I would have thought that all portals would be using an installer of some description, so should already be setting up the relevant permissions for the folder structure needed for your game/app. Of course, you'll know better than me in this regard, as you've had plenty of experience with portals already, whereas I've had none.
Having said that, it would be good if we could figure out how to do this in code, so we're not having to rely on third parties.
Having said that, it would be good if we could figure out how to do this in code, so we're not having to rely on third parties.