EAP5 installer doesn't extract native package on RHEL4

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
               |-- ...