I see that you're using version 0.10 -- you may want to test if the same error occurs in 1.0 beta. With that said, Zend Framework recommends PHP 5.2, so we also state that as a requirement for Omeka since we've built-off that. There may be some pieces that aren't fully functional as a result -- we simply don't know.
I have a hunch as to what the problem is. Can you double check that you've uploaded ALL of Omeka? Notably, the /themes/ folder? When Omeka is unable to load the script index.php, it appears that it's unable to find the appropriate page template.
Diving a little deeper into how Omeka works, when the front-end of the system is loaded, Omeka looks for a 'view' (if you're familiar with M-V-C architecture.. this is basically a page template). It looks in the theme you've selected (the default is set to the 'thanks, roy' theme during installation), and if it's unable to load the appropriate view, it looks for it in the core of the system. That would explain why it's looking for the file in /home/omeka-0.10/application/views/scripts/.
Let me know if that clears things up.