It is not difficult for me to get the sounds or change the AF to elves. The difficulty is to make a non shooter a shooter. Any did it so can explain me whats the trick? (Not to mention that after modifying Cranim.txt values in /DATA my editor .exe was out of use and I had to reinstall all WOG + millions objects)

The experience bug, here it is:

MAP BUG

It is a test map for tracking the bug. After Aeris fights five of the God creatures (quick combat to do), each of his four stacks of Lords of Thunder will be at level 10 experience, and if you then combine them into one stack, a negative experience overflow will result - which you can fix in the Hero screen by right-clicking on them.
(This is not a perfect solution - using the floating point e-variables in the script would be better - but I think it is "good enough".)

Apparently, during combination, the total experience of the combined stack is calculated as a 4-byte integer, by multiplying each stack experience by the number of troops in the stack, and adding the stack totals together.
When this number exceeds 2.14 billion (about 17,000 level-10 Power Liches), the total experience becomes a negative (4-byte) integer.