I wanted to replace my old Drupal 5.x site at http://newideas.net (IP 205.234.252.67) with a new Drupal 7.x site. So to make the new website as clean and new as possible I had my hosting company create a new domain for me at dev.newideas.net (IP 205.234.187.84) a few months ago, where I have completely rebuilt the newideas.net site with a fresh Drupal 7.x installation. Then I hand "cut and pasted" all of the text into new pages, keeping most of the current file names, just giving them "relative" url's so they'd still work when I changed the site from "dev" to "www".
Everything seems to be running fine at dev.newideas.net . Now I want to kill the existing http://newideas.net and replace it with the dev.newideas.net site.
Can I just simply delete/kill the old/current newideas.net site, and then change the appropriate settings in the dev.newideas.net > settings.php file (what's there now is just "boilerplate" text) so that the database settings are correct for "newideas.net" and the base URL setting is correct, and the variable overrides are correct for the "new" site?
Then can I just assign the old "newideas.net" site's IP address to the new "newideas.net" site?
Would that work to replace the old site with the new site?
Obviously I don't do this for a living (I'm a therapist, not a programmer), so please advise with small and simple words.