1. mkdir Repast - this will hold all of these files
   cd Repast

2. Into this Repast directory download 
   repast.jar
   colt.jar
   plot.jar
   trove.jar

3. Download these class files into the Repast directory:
  HeatBug.class
  HeatBugsModel.class
  HeatBugsModel$2.class
  HeatBugsModel$1.class
  HeatSpace.class
  
4. to run:
java -classpath repast.jar:colt.jar:plot.jar:trove.jar:. HeatBugsModel

5. To run Sugarscape in RePast:
  mkdir Sugarscape
  cd Sugarscape

  Download into Sugarscape:
  SugarAgent.class"
  SugarModel$1SugarRunner.class
  SugarModel$AvgAgentMetabolism.class"
  SugarModel$vgAgentVision.class"
  SugarModel.class
  SugarSpace.class
  sugarspace.pgm

  cd ../  (go back into Repast directory)
  
  To run:
java -classpath repast.jar:colt.jar:plot.jar:trove.jar:./Sugarscape:. SugarModel
  
 This assumes that SugarModel.class is in the directory Sugarscape