Question: I am using magento community version 1.8.1. I am using FedEx for shipping method.

I enabled several method like 'First Overnight','2 Day','Priority Overnight','Standard Overnight','Ground' and 'International Ground' from admin.

But only four are appearing in front end. 'Ground' and 'International Ground' is not appearing.

Can anyone help me on this ?

Answer: 
Turning *Residential Delivery* to *No* worked for me.
What packaging type have you set in the admin (System->Configuration->Sales->Shipping Methods->FedEx->Packaging)? I think for FEDEX\_GROUND you need to set the packaging to 'Your Package'.

But I am not certain of this. The available shipping methods returned by the FedEx API remain an enigma. Try lots of different settings and see what types are returned. Maybe FedEx help desk can tell you the magic settings you need to pass into the API to get FEDEX\_GROUND back.

If you want to dive into the code, read `/app/code/core/Mage/Usa/Model/Shipping/Carrier/Fedex.php`.