remove some post features in 1.5

hey all
searched but could not find out if it was possible to remove the “next post” and “previous post” features in wp 1.5 that show up when you are reading a specific post. Also what file do i need to edit to change the wording in the section at the bottom of the page where it says:

‘ This entry was posted on Wednesday, February 2nd, 2005 at 2:01 am and is filed under Main. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.’

thanks !!