The hardest part about replacing the valve cover gasket is having enough room to take it apart!
The valve cover gasket is VERY easy,
Remove valve cover
Remove old gasket
Install valve cover
Install new gasket
Yours might also have rubber "washers" under the valve cover bolts that need replaced. The valve cover FLOATS between the two rubber parts, realize that the bolts have a torque spec of 14 INCH POUNDS, thats like 4 foot pounds.