Would be cool to know hoe you did it. :>
well if you know what you are looking for, the rest then is pretty easy, what took me long was to actually find what i should look for

here are the default speeds and the valuse that represent something like a delay:
speed numbers and actual values
lower is faster but a 0 will crash the application!4=182=faster
3=213=fast
2=256=normal
1=320=slow
0=426=slower
you see i was looking for the values 0-4 when the actual true game speed value was the 3 digit numbers 426-182
here is a shot with the actually memaddress that is been changed to work. its from 1.5.0 beta.

other addresses in this shot include the speed scrollbar, and the pause feature.