I have had it lock up in neutral and unable to shift out, not lock up completely. The screwdriver trick is you take the shifter out. Then when you look down you will see the two bars that are used to shift into 4x4 mode and low range. You can then use a screw driver to line everything back up and put the shifter back in.
A new shift sheet fixes this problem. You can go with either brass one or just a new poly one. If the transmission is loose when shifting give Hawk Suzuki a call and they sell a new shifter for the transmission as well.