Please check the link before reading the post. Why fix your own game when we can do it too? 
Basically I want to know if modifying the beta is against the agreement, which I assume we'll have to agree to to enter the beta. I wasn't thinking of using an actual mod, more like creating one installation and then copying it and modifying it directly, since I assume it won't come with actual mod support, i.e. example mods as you would find in mods.scd for Supreme Commander. This is of course assuming that DemiGod will come with script, and not completely illegal to modify C/whatever code only.