[PHP] Add PHP Module?

[Ed.Lazor]

I need to enable MCAL and Mcrypt support in PHP.  Do I have to recompile or is there 
another option?
 
Thanks,
-Ed
 
System Info: 
RedHat 9.0. 
Apache and PHP installed via RPM. 
PHP v4.2.2. 
Server API Apache 2.0 Filter