Inners are easy as hell.
Remove axle from car.
Cut both boot bands or use a screw driver to open them.
Push the boot back off of the larger cup section.
Reach inside the cup and feel around for a thin wire ring type part that's recessed in a groove. Use your fingers or a screw driver to pull it out. Don't bend it.
Pull the axle out of the cup. Watch the bearings on the tri-lope to make sure they don't go spilling everywhere. Keep them on the tri-lope if you can. If not, take them off carefully and set aside.
Inspect everything for dirt or rust. If it's really gritty and looks worn, junk it and get a new axle. If not, continue.
Look for a c-clip on the top of the axle. This holds the tri-lobe part in place. Remove it.
Slide the tri-lobe pare off and set aside.
Remove the old boot.
Replace with new boot.
Reassemble in opposite order.
Put the band on the side with the axle shaft first. Then fill the boot with the correct amount of grease. The OEM kit comes pre-measured.
Put the other band on and rotate the joint side to side and in and out so the grease is in place.
Replace in the car.
In a nut shell. Good luck.