When native package is chosen during console installation from installer, that package is not extracted at the end of installation on RHEL4.

Instead target dir contains zipped library, ie.

jboss-ep-native-RHEL4-i386.zip

On RHEL5/6 it is extracted as expected ending with directory structure:

targetDir
   |-- jboss-eap-5.3
          |-- ...   
   |-- jboss-ep-5.3 
          |--native
               |-- ...