Yes, you can apply a nodal load anywhere on the surface of the shell and that load will be resisted by the meshed elements of the shell. All that is required is to add a node at the location of the load.
If the load is close to the edge, put the node right at the edge to avoid a tiny mesh between the node and the edge.
Make sure you have the option to segment shells turned on under Process - Analyze - FE model tab:
Also make sure you are running version 13.00.03.45, this is a fairly recent enhancement to Ram Elements.
For more on shells in Ram Elements, visit this wiki: http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/ram-elements-shells-faq.aspx