Fairly simple.
Loosen the axel nuts (with weight on the tires), jack it up, set it on jack stands, pull the tires, pull the front brake calipers, remove the three bolts and pull the hub assembly the pull out the half-axel. Repeat on other side.
One hint: after removing the clips off the axel that hodl the u-joint into place, use some Liquid Wrench or PB Blaster and let it sit for awhile. This will help in the removal process.
Using a set of sockets, one big and on slightly smaller than the u-joint, smack it out. Put the bigger socket onto a hard surface and then put u-joint onto the socket, then use the smaller one to tap (or bang) the u-joint out.
Once you get that far, you can figure out how to pull it apart and re-install it.