file alteration monitor - gamin - dnotify - inotify

I need to monitor a directory for the creation of new files, then a
script should be launched (doing some stuff with the contents of the
file and after that the file should be removed).

I am using RHEL5, but I am having trouble finding information to set
it up. When I do a locate on inotify, denotify or gamin it returns a
list of files and directories so I reckon it is installed.
The examples on http://search.cpan.org/~mlehmann/Linux-Inotify2-1.1/Inotify2.pm
don't work because it cannot find Inotify or Inotify2. According to
some info gamin uses inotify but the 'locate gamin' only lists
dnotify.

Is there something that needs to be activated or installed before you
can use inotify or gamin/dnotify and where can I find a good manual
and examples ?

Thanx,

Pugi!

.

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