Welcome to the stargard.ca website. I run a consulting company in Ottawa Canada specializing in Unix Administration.
My CV is at http://www.stargard.ca/cv
I have extended the Linux_toolbox for AIX 5.2L. You can find the RPMS and SRPMS at http://www.stargard.ca/aix. These RPMS should work under AIX 5.3, but they are untested there.
There's also a couple of nice utilities I wrote to manage disks under Tru64 modelling Solaris' format command. They're at http://www.stargard.ca/tru64. The format scripts are suitable to include in a disaster recovery plan as they are able to run while booted from the installation cdrom.