Newbie questions

Hey there guys i am fairly new to modem hacking. I had looked into it once a while back but didnt get much help from another forum. I have some questions.
How many times can one modem be cloned? I was told by some one that it could only be cloned a max of 10 times.
I have a hacked modem for tw that i bought from some one. Can i clone this modem?
What do i need to clone a modem (tools, software, and any files i need to put in the modem)?

Thanks and hope to get more help here than i did in other forums.