Regeneration

In the last mission Out-of-commission (if you pick revenge path), I couldn't reach the helicopter after the ramp jump and I couldn't beat the game. I tried using my gamepad instead but with the same results! It only worked after I changed the jump key from space bar to something else. Jee... another bug in GTA.

lyla

Worked fine here, just using the default controls, keyboard/mouse.

Are you referring to the bit where you have to pull yourself up by tapping the jump key? or just the jump from the ramp triggering the sequence onto the helicopter?

Regeneration

Pulling yourself up by tapping the jump key doesn't work on two PCs here. Had to change the jump key for some reasons.