ok, so you'd have it so that each time you collect the item the script increases by one state:
State=0,plrtake=1:state=1
State=1,plrtake=1:state=2
State=2,plrtake=1:state=3
and so on. When you have reached the set number of pickups the script would then say:
state=10,plrtake=1:state=11
state=11:plraddhealth=1,
Unfortunately, there is no way to increase player speed or damage through FPI scripting. You could set it so that at state=11 a hud is displayed that makes the screen all "rage mode". But you're going to have to be more creative with the effects of rage mode, as speed and damage cannot be effected.
Hope that helps a little.
And cheers for the mention fred.