Periodically Run Wordpress Importer using Hosted File [WP Plugin]
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So I have a script that creates a WXR(Wordpress eXtended RSS)/XML file from a data source. Wordpress has a plugin to import WXR files but it requires me to manually go in and select the file. What I want to do is ever hour (or time period I select) have Wordpress Importer run using the file that's hosted on the same site. 

Would appreciate any tips or help. The code for the Wordpress Importer may be one option but I don't know how to modify it for this purpose. 

Thanks!