That exe only directly modify Wiz8.CFG to set the movement speed to the setting you set in that program.As told in other post, other action other then Mod / NPC movement will not be affected.
If you set again in the Game options to 5X, it will return to 5X rather then the setting you set in that exe so you wont see any different from before.
Not really a patch, but a hack. It did not seem to work for me either, at first. I tried it again and now see what it does ... I was expectign a dramatic difference going from 5x to 625x on monster movement speed ... it is not.It only affects when monsters are moving their physical location, not their combat actions/animations. So, if a piercer modai was going to charge you at 5x, he gets there in a blink of an eye at 625x.
Though this will speed up a bit, most of the time still passes the same as they swing, I attack, they reel back, ....
Tools for Wizardry(r) 7