How to get DCC engine reference when bootstrapped from tk-shell

I’m running tk-photoshopcc on the render farm. I can launch Photoshop via execute command from a bootstrapped tk-shell engine. Everything starts up fine and Photoshop has the task context as usual. I need to get the tk-photoshopcc engine instance, though, to run adobe bridge commands in Photoshop. But, the current “engine” is actually tk-shell - not photoshop. How can I get the tk-photoshop engine instance or create an instance of adobe bridge, so I can send commands to Photoshop…?

Thanks for any help!