Default loading of properties and update definitions....

project properties can be loaded as endpoints, by ${#Project#propertyname}
Enter this as endpoint for a webservice (don't forget to add the property to the project).

Below is a script to use at the "Load Script" on project level, it loads files from projectpath/settings.
Syntax for the propertie filename = environment_tst.properties
Syntax for the properties inside the file: endpoint=http://localhost:8080

import groovy.io.*;
import groovy.swing.SwingBuilder;
import javax.swing.*;

//determine projectdir by project.getPath, because GroovyUtils.projectpath does not work at startup
path = project.getPath();
log.info("path = " + path);
s= System.getProperty("file.separator");
settingsPath = path+s;
//settingsfiles are stored in projecpath\settings
settingsPath += "settings" + s;

//only works in versions > 4.0 because of SoapUI.isCommandline()
if(com.eviware.soapui.SoapUI.SOAPUI_VERSION.toString().substring(0,1).toInteger() >= 4){
 if(com.eviware.soapui.SoapUI.isCommandLine()){
  setProperties("environment_default", settingsPath);
 }else{
  openDialog();
 }
}

//Method to set project properties
void setProperties(name, location){
 try{
  //read properties file
  FileInputStream fstream = new FileInputStream(location + name + ".properties");
  DataInputStream ins = new DataInputStream(fstream);
  BufferedReader br = new BufferedReader(new InputStreamReader(ins));
  String strLine;
 
  //set new properties
  while ((strLine = br.readLine()) != null)   {
   attribute = strLine.split("=");
   project.setPropertyValue(attribute[0],attribute[1]);
  }
  ins.close();
 }catch(Exception e){
  log.info("No project-properties were set, could not find file for name: " + name + " and location: " + location);
 }
}

//Opens the swing dialog
void openDialog(){
 def swingBuilder = new SwingBuilder();
 File[] listOfFiles = new File(settingsPath).listFiles();
 int count, count2;
 def options = [];
 def browser = [];
 for (int i = 0; i < listOfFiles.length; i++) {
  if(listOfFiles[i].getName().contains("environment_")){
   name = listOfFiles[i].getName().replace("environment_","").replace(".properties","");
   options[count]=name;
   count++
  }
  if(listOfFiles[i].getName().contains("browser_")){
   name = listOfFiles[i].getName().replace("browser_","").replace(".properties","");
   browser[count2]=name;
   count2++;
  }
 }
 def pane = swingBuilder.optionPane(message:'Environment', selectionValues:options, optionType:JOptionPane.CLOSED_OPTION);
 def dialog = pane.createDialog(null, 'Select an environment (' + project.name + ")");
 dialog.show();
 setProperties("environment_" + pane.getInputValue(), settingsPath);
}