I have not been able to look at it. It's confusing to start in the middle og something.
However I found out that it is really (it should be) easy to do a speedhack for VC in memory!
Theory:
Look at this.
PL_MAX_SPEED= 0, 5.0, 1.8
PL_MAX_SPEED= 1, 2.5, 1.1
PL_MAX_SPEED= 2, 0.75, 0.5
You got three different move modes.
Run
Walk
Crouch
Then you can put "shift" to these things to move even faster.
The important thing is that the value actually changes, thus it will be really easy to find the base-value which we can lock.