Index: U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/CompilerConfig.java
===================================================================
--- U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/CompilerConfig.java	(revision 2144)
+++ U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/CompilerConfig.java	(working copy)
@@ -1589,8 +1589,16 @@
             String name = requireAttribute(var, "name");
             String value = requireAttribute(var, "value");
             String conditionid = var.getAttribute("condition");
+            List dynvars = null;
             if (dynamicvariables.containsKey(name))
-                parseWarn(var, "DynamicVariable '" + name + "' being overwritten");
+            {
+                dynvars = (List) dynamicvariables.get(name);
+            }
+            else
+            {
+                dynvars = new ArrayList();
+                dynamicvariables.put(name, dynvars);
+            }
             DynamicVariable dynvar = new DynamicVariable();
             dynvar.setName(name);
             dynvar.setValue(value);
@@ -1595,7 +1603,14 @@
             dynvar.setName(name);
             dynvar.setValue(value);
             dynvar.setConditionid(conditionid);
-            dynamicvariables.put(name, dynvar);
+            if (!dynvars.contains(dynvar))
+            {
+                dynvars.add(dynvar);
+            }
+            else
+            {
+                parseWarn(var, "DynamicVariable '" + name + "' being overwritten");
+            }
         }
         notifyCompilerListener("addDynamicVariables", CompilerListener.END, data);
     }
Index: U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/DynamicVariable.java
===================================================================
--- U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/DynamicVariable.java	(revision 2144)
+++ U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/compiler/DynamicVariable.java	(working copy)
@@ -89,6 +89,22 @@
         this.conditionid = conditionid;
     }
     
-    
+    public boolean equals(Object obj)
+    {
+        if (obj == null) { return false; }
+
+        if (getClass() != obj.getClass()) { return false; }
+
+        DynamicVariable other = (DynamicVariable) obj;
+        return (name != null ? name.equals(other.name) : other.name == null) && conditionid != null ? conditionid
+                .equals(other.conditionid)
+                : other.conditionid == null;
+    }
+
+    public int hashCode()
+    {
+        return (name != null ? name.hashCode() : 0)
+                ^ (conditionid != null ? conditionid.hashCode() : 0);
+    }
 }
 
Index: U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/installer/InstallerFrame.java
===================================================================
--- U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/installer/InstallerFrame.java	(revision 2144)
+++ U:/workspaces/work2/IzPack/src/lib/com/izforge/izpack/installer/InstallerFrame.java	(working copy)
@@ -283,22 +283,32 @@
     private void refreshDynamicVariables() {        
         if (dynamicvariables != null) {
             Iterator iter = dynamicvariables.keySet().iterator();
-            while (iter.hasNext()) {
+            while (iter.hasNext())
+            {
                 String dynvarname = (String) iter.next();
-                DynamicVariable dynvar = (DynamicVariable) dynamicvariables.get(dynvarname);
-                boolean refresh = false;
-                if (dynvar.getConditionid() != null) {
-                    if ((rules != null) &&  rules.isConditionTrue(dynvar.getConditionid())) {
-                        // condition for this rule is true
-                        refresh = true;
-                    }                    
-                }
-                else {
-                    refresh = true;
+                List dynvars = (List) dynamicvariables.get(dynvarname);
+                DynamicVariable dynvarToUse = null;
+                for (int i = 0; i < dynvars.size(); i++)
+                {
+                    DynamicVariable dynvar = (DynamicVariable) dynvars.get(i);
+                    if (dynvar.getConditionid() != null)
+                    {
+                        if ((rules != null) && rules.isConditionTrue(dynvar.getConditionid()))
+                        {
+                            // condition for this rule is true
+                            dynvarToUse = dynvar;
+                            break;
+                        }
+                    }
+                    else
+                    {
+                        dynvarToUse = dynvar;
+                    }
                 }
-                if (refresh) {
-                    String newvalue = substitutor.substitute(dynvar.getValue(), null);
-                    installdata.variables.setProperty(dynvar.getName(), newvalue);
+                if (dynvarToUse != null)
+                {
+                    String newvalue = substitutor.substitute(dynvarToUse.getValue(), null);
+                    installdata.variables.setProperty(dynvarToUse.getName(), newvalue);
                 }
             }
         }