Byte range

Byte ranging is already built into Apache so there is no need to "enable" it.

If you are using Itunes or having byte-range issues with audio/video/podcast files the issue is with how the file is handled.

If the file you are accessing is on a Wordpress website then website owner will need to make change to their code.

This page explains why:

http://core.trac.wordpress.org/ticket/15552

This page explains how to make the necessary corrections:

http://mobiforge.com/developing/story/content-delivery-mobile-devices