Exiftool, quick and easy for RHEL/CentOS 5.x

Almost the latest version as of now, the one most 'production ready'.
Be root, cut and paste into your terminal and voila!

mkdir extra_packages
cd extra_packages/
wget http://owl.phy.queensu.ca/~phil/exiftool/Image-ExifTool-9.04.tar.gz
tar xvzf Image-ExifTool-9.04.tar.gz
cd Image-ExifTool-9.04
perl Makefile.PL
make
make test
make install