I just released mrepo 0.8.6 with RHEL 4.7's RHN/up2date code included which makes mrepo work on other distributions without requiring to copy those libraries.

Some of the highlights include:

• Support for RHEL5 and CentOS-5.
• Added YaST Online Update support.
• Added fuseiso support (root access no longer needed).
• Added unionfs support to merge ISOs to a single tree.
• Faster relinking of repositories.
• Caching of directory indexes to prevent regenerating repositories.