happy new year, vlasov! if u want to join the beta group, then just ask IcePack nicely. u will then be able to design and test ur own scenario. u'll simply be changing the initial troop numbers on existing maps, so need no artistic skills at all!
I also asked to join the Beta site elsewhere in the Map Foundry... topic: "WWII Scenarios". Ian says I should ask "IcePack" nicely. If you see this message here, Mr. IcePack, please consider this as a nice respectful request.