How do I create a fullwidth website skin to stretch across the whole site? I think it has to have an image that will repeat? I've done this, but i feel like I'm missing a step. Please help!

Check one of the "full width" skins that come with DotNetNuke. Just style the "body" to have width="100%".

The only DNN skin I have is minimal extropy and it is not a full width skin. My headers are designed for 950px, however I know to have full width an image needs to repeat, but I'm not sure how to get the image to repeat.

To get an image to repeat, specify the repeat in the css. The same place you specify the background image.

If you go to the Codeplex DotNetNuke site, you can download one of the old skins (i.e. Blue). There is a full width skin there.

You may want to check out this tutorial:
Pure CSS SEO Layouts for DotNetNuke skins

This basically shows how we have created the DNN Creative skin.

You may also want to have a look at the code for:
Andreas 09

Simple Red Leaf
is a simple pure CSS skin that is 100% width, with tutorials on how we created it here:

• How to create a pure CSS skin
• How to create CSS containers