Is it possible to force mount games in GMod 13 Beta?

[dashiellbell]

Hi, I have L4D, L4D2 and Portal 2 and I want to mount them, but in the latest beta update Garry made the game not mount any partially installed games, please don't "just say wait for the download to finish", I would really like some help with this, I'll do something in return if I get the answer!

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