Jeep Repair: Sparg Plugs, jeep grand cherokee, coil pack

Question
Hello,
I have a 2002 Jeep Grand Cherokee 4.0 Laredo and need to change the plugs but I could not find them and some one pointed at a box which I think is called Coil Pack.  Now I'm stock to take out the Coil Pack.  I took out 3 bolts but still too tight.  Is there any other bolts some where? Also, I was advised to adjust the gap and torque but I'm not sure what they're talking about.  Would help me with this please?
Thank you,
Sam

Answer
u missed a bolt  take a look at the front one near the belts  see where the 2 there are   the same is for the one set in the back.  as for the gap of the plugs  make sure u have champion or NGK and the gap is the distance of the tang and electrode of the plug. there is a sticker on the jeep that says  gap is .40  or something like that. Get a gaper   .99 at most stores  and make sure all the plugs u get are gapped correctly.