[otrs] OTRS on Enterprise 3

We've got a VPS with adiungo.com, running RedHat EL AS 3. When we try to install OTRS we get the following: error: Failed dependencies: perl-Digest-MD5 is needed by otrs-1.2.4-01 perl-MIME-Base64 is needed by otrs-1.2.4-01 apache is needed by otrs-1.2.4-01 mysqlclient9 is needed by otrs-1.2.4-01 Is anyone able to provide step-by-step (relative newbie-level) instructions? We've reasonably familiar with RH9 but new to Enterprise. Also new to OTRS. Thanks very much and sorry for being a newbie, Dave