Upgrade to CMOD V9.5 ??
This was added in this version.
You can try with just the thick client V9.5.0.3, if that works. Since this was a new feature.
I am not sure if the server side must be updated to have that functionality.
Otherwise I do not know any method to do what you are requesting... except by developing your own thick client...
In all cases, don't forget that CMOD V8.5 is out of support by end of April 2016... so upgrading to CMOD V9.5 is a valid answer