Fedex shipping module does not display ground shipping options because Fedex requires fdxg with fdxe for ground shipping (now since they changed it), so in fedex1.php (fdxe only) it will no longer display ground shipping as an option on your checkout page.
1. Setup fedex in shipping module.
2. Then test checking out and ground shipping will not show up.
1. Repeat step in option one with debug turned on.
2. Manually edit the script in file fedex1.php and only send data back to Fedex server for ground shipping (with debug on) and it will say no data sent back.