You could look into revamping those PC's with Linux. You could give it a test run to see how you like it and it won't cost you a cent. If the decision is that you don't like Linux then you can always go onto Macs or whatever. Linux can run on ten year old PC's like a champ.
I don't know anything about religions, or what a Lutheran is, but there is a really user friendly Linux distribution called Ubuntu, give this a go http://www.ubuntu.com/. Ubuntu also has an offshoot called Ubuntu Christian edition http://www.whatwouldjesusdownload.com/christianubuntu/2006/07/about-ubuntu-christian-edition.html
Like I said I don't have a clue what a Lutheran is, nor do I have much idea what a Christian is. So I don't know if this Christian edition is what you would want. I do know that it has all the Bible stuff installed though.
I don't know anything about religions, or what a Lutheran is, but there is a really user friendly Linux distribution called Ubuntu, give this a go http://www.ubuntu.com/. Ubuntu also has an offshoot called Ubuntu Christian edition http://www.whatwouldjesusdownload.com/christianubuntu/2006/07/about-ubuntu-christian-edition.html
Like I said I don't have a clue what a Lutheran is, nor do I have much idea what a Christian is. So I don't know if this Christian edition is what you would want. I do know that it has all the Bible stuff installed though.