I've done that on a '98 without the tool. I have a couple old worn-out small screwdrivers (no sharp edges) that I used for the clips. Sorta like you'd use tire-spoons on a high-pressure bicycle tire...

I'm sure the tool makes it possible to install the spring clip in a matter of seconds. But without it, it's not all that bad. Practice by getting the spring clips off from the old boots. It's really not that easy to puncture the rubber boot; just work around & don't get impatient & careless.