How do I get p robbing uncle sam & cesar vialpando mission in San Andreas with real cars 2 installed?

in robbing uncle sam, cj n ryder go to the national guards. Cj has to use the forklift to load 6 boxes into a truck. The thing is the modified/new forklift's arm does not go low enough to lift the boxes. In the cesar mission cj receives a car fitted with hydraulics n has to go to unity train station to enter a hopping or w/e competition. when I arrive there I do not see a red marker. Plz ist if u can.