I used these instructions to to do my lower ball joints over the weekend. I also ended up doing uppers and both tie rod ends, as well as shocks. Overall, the directions are pretty good, however they fail to mention the biggest pain in the ars portion of the project (at least for my '98 ranger). These instruction begin with the 4WD hub already removed. I did not have the actual hub puller so I had to spend over an hour fabricating a slide hammer puller to remove the hub. When this was done it came off easily, however there was a plastic snap ring inside the hub to prevent the axle from pulling out of it. This was a monumental pain in the ars to get out and I broke the one on the passenger side causing me to wait until Monday morning to get one from the Ford dealership. BTW they charge $20 for the stupid plastic snap ring... absolutely unbelievable!
As for the press tool, it worked very nicely to remove the old lower ball joints, however I had to cut a piece of 2" pvc to use as a spacer between the top of the joint and the cone of the press tool. This helped a lot and drove in the joint nicely.
Overall, this is a very good guide, but be warned (at least in my case) the 4WD hub was a nightmare to deal with. If anyone is interested in the puller I made, let me know and I'll see if I can get some pictures.