Although I've already posted the same thread at SPUF, also posting here in a hope that Piriform uses this information to add Steam folder management.
How to safely remove 3rd Party Installer Packages and safely disable First Time Installation notices
Steam purchased games are downloaded with 3rd Party Installer Packages (3PIPs); which are steam redistributed programs, then automatically installed during a process called "First Time Installation (FTI)?. Steam gives you two options; either proceed to installation or bypass the installation. Unless user goes through FTI and install everyt