Install Direct Admin on Rackspace

I have Rackspace server with Cent OS 5.5. Need help to install Direct Admin. Complete, optimized LAMP requirement to host Joomla + Moodle website. Few required configuration are 1. Configure firewall 2. Spamassasin 3. Curl 4. MRTG I may request installation of additional script if Moodle 2.0 requires. The charges to include the license cost of DA. Therefore you should own developer license for Direct Admin Payment 50% upon completion of Installation Remain 50% upon testing maximum, 2 days upon completion of works.