[CentOS] Installing a RPM with yum

Wed May 17 15:34:57 UTC 2006
Claudio Castro <ccastro at unr.edu.ar>

Hi all, this is my first post...
Here the situation, I've installed php 4 with yum, using the default 
CentOS repositories, but now I realize that I need the Informix 
extensions and others like unixodbc, gd etc. This last two packages 
where in the repository so I search with yum and I found them, and 
install them, but not the Informix one.
So here my question, when I install a RPM package, then, how I change or 
add extensions?? the same with Apache and ssl support .

Any help would be apreciated

Regards.

Claudio