For the first scenario, it is a fan scenario and the VASSAL setup is on an extension file here
www.vassalengine.org/wiki/Module:Command..._Colors:_Napoleonics
Direct download
www.vassalengine.org/mediawiki/images/9/..._Fansscenarios3.vmdx
Save the file, and in the VASSAL Module Library (the initial window), Right click on the CCN Module and Add Extension
You can then load the the fan scenarios as normal
Probably use a number of fan scenarios in this tournament, because most of the official scenarios have been used previously in other tournaments. Players need a fresh challenge, and with the play both sides form, even unbalanced scenarios can show player skill in mitigating the loss.