Single or stacked switches? do they have same port numbers? same port types? Generally speaking copying/pasting the config from the 2960 to the 2900 would do the job. However, if the switches have different ports numbers then you would need to apply each port type config to the interested ports on the 9200. And if they have different ports ID for instance Gi0/1 versus Gi1/0/1 then you need to edit that on a text file before pasting to the 9200. Also, if you are using dot1x some of the commands syntax might be slightly different. What I would recommend would be copying/pasting the global commands section by section, and then move to the ports configs trying couple first and then do it on the remainder ports.
