i saw a product today in a computer shop called SIM master, its like a card-reader. well it was certainly new for me and the product box said that we can edit text messages, manage pin numbers etc.. it also said.. copy 8 sims to SIM magic. i dont know what that means.. is there a way with the help of a software and that hardware that i can copy my 3 different operator numbers to a single sim? or any other wonders i could work with that SIM reader?

You probably can't put 3 different numbers on one card. Those SIM card readers have been around for years, but since all my contacts and messages are on the phone, and not on the SIM, they don't seem to be so usefull to me.
Although I heard once you could actually make a duplicate SIM yourself, which would be usefull. But not so sure about the latter... (and how legal that would actually be)