You can, start the scenario in single player then save it and go to ...\Call To Power 2\ctp2_program\ctp\save\games\ then move that folder with the saved World Map game inside into ...\Call To Power 2\ctp2_program\ctp\save\mp. Then enter the LAN game and load the previous World Map save.
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Call to Power 2: Apolyton Edition - download the latest version (7th June 2010)
CtP2 AE Wiki & Modding Reference One way to compile the CtP2 Source Code.