Adding command line parameters to maven exec plugin
===

I'm trying to run a java program using the maven exec plugin using the exec:exec goal.  
I need to add an additional jar to the classpath (the sun tools jar).  
Since the includePluginDependencies works only for the exec:java goal I thought adding it manually in the arguments section but couldn't find a way to concatenate it to the base classpath.  
If someone knows how to do so from the command line it's even better.
Thanks in advance,  
Avner 

* You can see the plugin section bellow

                <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <dependencies>
                    <dependency>
                        <groupId>com.sun</groupId>
                        <artifactId>tools</artifactId>
                        <scope>system</scope>
                        <systemPath>${JDK_HOME}/lib/tools.jar</systemPath>
                    </dependency>
                    <dependency>
                        <groupId>${project.groupId}</groupId>
                        <artifactId>myArtifact</artifactId>
                        <version>1.0</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <executable>java</executable>
                    <arguments>
                        <argument>-classpath</argument>
                        <classpath/>                        
                        <argument>com.mycompany.MyMainClass</argument>
                    </arguments>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
