The easiest solution to build your jars is to use the Ant build scripts that come with both projects. If you are using eclipse, then in the jME and jME Physics projects you will find a file named Build.xml. Right click on that file and Run As… Ant build Script. It should bring up a dialog which list the different built tasks you can do. Check the one named 'dist-all' for jME and run it. This will place the jars in a folder named 'target' in your project directory. Then do the same for jME Physics. Post back if you get stuck.
Thank you for the reply !
Well that helped alot . It didnt build at first but it gave me an error to work with so i managed to get it running ! 
i really appriciate your help :))