if you use it for windows based machines read on if not don't bother....
i don't really see the need to integrate since you can run it from your station and specify the left and right paths and of course the credentials for them
i use robocopy http://technet.microsoft.com/en-us/magazine/2006.11.utilityspotlight.aspx
and it does the work for me.
just for the fun of it i integrated it to mremoteng as an external tool (again i don't see the need...) since you can save the default configuration (in your case it would be the left side with it's credentials and the parameters you want to use for the copy)
this is how i configured the external tool: , again it runs from my laptop if you want to run it against different servers or workstation you will need to install it locally on these machines and add the /computer argument