From the table in the Verkhoshansky link I gave you above (I’m leaving out the plyos that Charlie recommended AGAINST in Edmonton), Dr. Verkhoshansky lists:
Squats 2X2 @80-85% 3-4 min rest
set break 3-5 min
box squats (explosive) 16-24-32kg (2-3)X(4-6) rec 3-4 min
The key for doing this is that the second workout MUST be explosive to get the intended effect.
Also note that Dr. Verkhoshansky says that this workout should be the first in a day (so it would not be weights after speed in CFTS) and the rest after this workout should be at least 4 hours.
I might (and have) done this very workout as a replacement for speed, but not in addition to speed (though I suppose you could do tempo 4 hours later).