argh, rear ball joints

[Brandon002]

So after dealing with a pesky and extremely annoying squeak from my driver's side rear suspension over the past 2 months I finally got under the car now that we moved in to a house with a big enough garage.

Turns out the squeak is coming from the ball joint. I've read up on making a tool to press them in or out. Has anyone ever tried to pull the rubber boot to clean and install new grease? I figured it might be worth a shot until I can afford to replace more of the rear suspension (plan on the full front and rear refresh from ECS once we actually have some spring weather).

I am just looking for a temp fix as it's embarrassing rolling up to pick my daughter up from school in a high end SAV with a ton of damn squeaking coming from under it. I just don't want to have to pay for an alignment twice if I don't have to and after just moving cash is very tight.