Ok i think that he's new at linux not just sme so i'll post some pointers.
If you need aditional functions (like phpmyadmin) you have to install a contrib for it. You can find them in this forum (use the search function for announce or contrib).
You then have to install it using a ssh client (google putty) and you have to enable ssh (check the manual).
Make a new dir for your rpm's (mkdir temp) and move to that dir (cd /temp).
Then use the wget command to download the contrib (eg: whet
ftp://someserver.com/phpmyadmin.rpm). Use rmp's not srpm's.
Then install it using yum contribname.rpm folowed by signal-event commands.
I hope that this is what you were looking for.