Start an Exhibition game on Rookie difficulty (it doesn't hurt to have unlimited rewinds as well). For your team, choose the Oakland Raiders. You want to be the AWAY team. Choose the Indianapolis Colts as the home team. This way, you will be playing in a dome where there is no wind/weather to screw you up.
You need to get to the opponents 43 yard line to make a minimum 60 yard field goal. The kicker for the Oakland Raiders has one helluva boot on him. He will EASILY make a 60 yard field goal.
When you are lined up to attempt the kick, make sure you aim as low as the pointer will go. Your power level must hit between 98-100 and your accuracy must be in the green. When I attempted it (and I kicked from the 44 yard line, which was a 61 yard field goal for me), I cleared the crossbar by a few yards. So you shouldn't have too many problems.