I realize the budget, but where there's a will there's a way. It's good that he is now aware. Then he can examine his options and see what he can pull off. If he can do it he'll be much happier in the long run. Then he can buy me a beer, and I love my beer. 
It really won't be THAT much more money to upgrade the couple of components I mentioned in the long run, but it will give him more oomph. My wife had the Dell Dimension 3000 with a 533 MHz BUS, same clockspeed as one of mine, but mine simply blew it out of the water. There was no comparison.
He doesn't HAVE to upgrade his RAM. That RAM will work fine and comes with a lifetime warranty if I recall correctly, but certainly he needs to take a look at that CPU.
It really won't be THAT much more money to upgrade the couple of components I mentioned in the long run, but it will give him more oomph. My wife had the Dell Dimension 3000 with a 533 MHz BUS, same clockspeed as one of mine, but mine simply blew it out of the water. There was no comparison.
He doesn't HAVE to upgrade his RAM. That RAM will work fine and comes with a lifetime warranty if I recall correctly, but certainly he needs to take a look at that CPU.