How do I remove Postgres 7 and add Postgres 8?

[housni]

Hi,
I have 3 dedicated servers running on Plesk 8.1 and RedHat ES4.

The problem is that I need Postgres 8.x with PHP 5.

Unfortunately, I'm not all too familiar with Plesk or RPM based distros being a Debian user myself.

Could someone please advise me as to how I could disable the existing Postgres 7.x and PHP4 in Plesk and install Postgres 8 and PHP 5 via an RPM.

Or at least tell me how I can disable Postgres 7.x and PHP4, I can probably figure the rest out.

Thank You.

 

[housni]

I just realized, I already have PHP5.

Also, I do realize that what I'm asking for might not be recommended or supported further but I have no choice but to use Postgres 8.x and PHP 5.x so please let me know how to proceed even if it's an unofficial method.

In the meantime, some googling revealed this:

rpm -qa | grep "postgres" | xargs rpm -e

that's to remove postgres. Is this alright? Or is there a better method, via Plesk?