In RM2K3 there's the option to Call Event within the same map when an event is started. You can't do that in RMXP.

I've already got a vast majority of the RMXP graphics altered to fit into RM2K3 (I did them myself when RMXP came out, and the lack of features annoyed me)... I just need to find them.

I know scripting and programming, yes.