Ok I see

. 2^16 is 65536 )so at least you could turn it up to 65000

. This would not allow a 100K point battles though...
( However I did not notice the point sum would change if an assault battle was set up.)
Well I found a solution regarding the scenario design. I simply halve or divide the cost by 3. Then it will work regarding the scenario design. I have the CD version so with the Clone function it will be done easily

.
Artur.
PS: Have you considered adding battalion commanders as well? this way regiment or brigade sized units could be built up correctly.