If you have upgraded your Iphone to the new software this helps out a bit.

Once you have a copy of eGrid in photos, open it up then open safari to the sign in page at FedEx.
If you double click your home button it will bring up the last four items you have just used.
You can select Photos and it will bring up the pic you were looking at "eGrid" Just double click the Home button again to get back to the safari page again and so on. Jump back and forth between Photos and Safari as needed to fill in the eGrid.
Hope that helps.