I just did mine this weekend, the white plastic "fork" looking deal that comes with the switch covers makes pulling these easy without putting much pressure on the switches. I managed to get ALL of mine on without breaking a cover but I can see why so many guys say to go ahead and buy two sets before you start, I guess I was lucky.
If you buy new switch caps they come with a tool for removal. It is just a two pronged plastic fork that slides between the switch cap and switch housing and wedges the cap off.
i just bought the housings so mine didnt come with a tool. The only way i know to get the switches off is to pull them. Do you just slide them back on?