Originally Posted by gammascalper
I think a 302 is alright, but I'm not sure
The 302 sounds about right. For one of my sites ( which I recently changed from .html to .php files ) I used a 301 redirect ( a permanent redirect, as the html files no longer exist ). The 302 is a temporary redirect. I am not 100% sure about any SEO penalties regarding using a 302 instead of a 301.
However, if you plan to keep both domains, then I think a 301 would be fine to use. All you would need to do is to create a .htaccess file and upload it to the root folder of the domain.