Well, I couldn't get the cursor keys to work so I re-defined them to:
Q=up, A=down, O=left, P=right, Space=fire.
Then started the game - you've got a city map on the right and a sector map on the left. The yellow city map (right) is divided into the green sectors (left).
Press fire to start.
Look on the right map - the flashing dots are reps.
Use the up/down/left/right to get to one of the sectors occupied by the one of the reps - as you move around the yellow map, each sector is displayed in more detail with the green map. When you're in the same sector (left map) you'll see the rep appear as a red and yellow cross. Move you cursor over it and press fire. This will send you and your spinner to the reps location.
The view will change to a side-scrolling street. Once you've landed and gotten out of the car, you've got to catch up with the fleeing rep, who is off the screen to the right. You can see his dot on the scanner in the middle of the screen.
So, run to the right using your 'right' key, using up and down to dodge the people on the side-walk and the traffic on the road. If you manage to catch up with the rep, line up using up and down and shoot him to retire him. If the rep manages to out-run you and disappears off the scanner, your spinner will land and back up you go again to the main map.
Repeat ad-nauseum.
Dunno if you get the chance to VK em - I doubt it 'cos all I saw was a 'bounty' bonus.
BTW, I suck at this game - didn't catch one rep. The people keep getting in the way.