Questions about ubuntu ISP-Server Setup

[badgerbox76]

Hello i am a newbie and i am trying to setup a server as shown here

http://www.howtoforge.com/perfect_setup_ubuntu_5.10

Through out the installation process it asks for my hostname and i am not sure what its wants because i have setup a ulr name at noip which is monitorwaves.no-ip.org and my lan name is ubuntuserver. also when setting up the mail server can i specife my own name like @monitorwaves.no-ip.org ? In addition there is a step were you remove

#application/x-httpd-php phtml pht php
#application/x-httpd-php-source phps
#application/x-httpd-php3 php3
#application/x-httpd-php3-preprocessed php3p
#application/x-httpd-php4 php4

from the mime.types which provents me from using phpmyadmin, is there a way to run both ISPConfig phpmyadmin and phpnuke on the same system.

thanks much for your time and help