A press is like a jack going down usualy. Its something that will exert alot of pressure on the inserts to remove them. The ghetto away around this is, This what I have heard I have never done this, You have been warned this is one way of doing this and could be the wrong way I am in no way responsible for any injuries or accidents that may happen, with that aside.
I heard one way of doing the inserts are. To torch the old ones out with like a butane torch and break them up. They can be a bitch to get out. Then you can use a 2x4 and a bench vise to press in the new inserts or jack up a car and put them under a tire and slowly lower the car

Not the most scientific way of doing it but from what I have heard either way is pretty easy. Im thinking about doing them this summer if I get a job. Im sure my 93's are getting pretty crappy. Dont think any of them are falling apart yet, no loud clunks or moving engine, but figure it wouldnt be bad to do.