It's a PITA for sure ...
I put my car back to stock, so I won't be changing that belt again, but this gives you the most space to work with IMO
- Remove the radiator overflow tank
- Remove the upper and lower radiator hoses and drain the coolant
- Remove the cooling fans and OEM shroud (this requires disconnecting the remote mount thermostat and some oil cooler lines) See the GTM instructions for more details.
This gives you the most workable space to get to the tensioner and change out the belt.
Good luck