Make sure in your header etc you make sure to use FULL URL not RELATIVE PATHS.
would be something like this http://www.insidepoolmag.com/forums/...a/misc/faq.gif
Now the easy way to do this is simply go into your vbulletin admin and hit the styles admin and view the global options of the style you are using. There will be a bunch of relative directory paths like such
Simply change all those directories to full url and you should be okay. There may be on or two more tweaks to make since your using a custom style especially the aria style