This should be very quick and easy. I've attached the instructions below from M2E Pro for the cron install. I don't know if their example is complete, but here's what we need exactly:
The cron should enable the 'run synchronization now' for stock level, orders, ebay categories, and ebay layout template in M2E Pro every 30 minutes.
We have several more customizations needed for magento platform if this goes well.
Here are the instructions for the cron from M2E Pro:
• Go to CPanel->Advanced
• Choose your experience level. (normally-standard)
• Enter Command to run. Command must have the following format:
[/absolute/path/to/bin/php]–f [/absolute/path/to/magento/[url removed, login to view]
o example: /usr/local/php5/bin/php -f
/home/user/public_html/magento/[url removed, login to view]