Changing Permalinks- losing css, images on subpages

Hi all,

I have a site that uses relative linkage for images, swfs, etc. Everything works smoothly in the “ugly” format, but when switched to /%postname%/ format, I lose majority of my links on all but the home page.

I’ve tried using absolute paths for everything, but I am having issues stemming from the multiple domains attached to the site.

For instance-
Using absolute paths: My flash nav works on http://www.example.com, but then stops working on http://www.examplesite.com. Both pull from the same ftp, the same directory.

Using relative paths: My flash nav works on all attached domains. However when I change the permalinks, the swf doesn’t even appear.

The question: Is there a better way to rewrite these permalinks, without going through wordpress? I’m on a linux server, and can access my .htaccess file, if necessary.

Thanks in advance!!