1. first install CLEO3
How to do, look at
http://zazmahall.de/ZAZGTASANATORIUM/CLEO3BASIC.htm#CLEO3BASIC_eng

2.
copy Teleport_to_marker.cs into GTASA\CLEO - folder



Set first your red marker on the SA map
(switch with ESC to main menue and then to the map),
press Y and X in game to teleport to the marked position