Do not use any sealant in the groove. The gasket is rubber and has tabs to hold itself into the cover.
The front is a piece of cake, the back is easy and time consuming.
Loosen engine lift bracket used to pull motor on front right of motor. (loosen, no need to remove)
Loosen coil pack bolts and remove the one at the rear of the coil packs, flip coils upward in the front.
Remove valve cover bolts and remove valve cover.
Pull old gasket, bolts and rubber bolt pass throughs and clean valve cover groove (Brake clean and a brush work well)
Clean surface on head (I wiped with rag and brake cleaner)
Put new bolt pass throughts, bolts and gasket in groove on valve cover and reinstall. Torque spec is a certain amount plus 40 degrees. Once the torque amount is met turn handle of ratchet 40 degrees more.
Put coil pack back down and tighten engine lift bracket.
here'* some pics
Front cover (Engine pull bracket front right, coils left)
Expect the gasket to look squashed
If you are also going to do the rear, pull the bracket the O2 sensor connector clips to, the bracket w/map sensors and egr guard and flop alternator out of way.