Clone prepaid Sim Cards??

My questions my be annoying but I'm a neo when it comes to cloning sim cards and will like to be schooled by the pros! I have a bunch of questions and I hope you all can help me out.

How can you clone a prepaid sim card?
If you clone the sim card will it have the same phone number to recieve cards?
Can you just make a card unlimited, by adding more blocks?
Can you recycle a card that has be used up by rewriting the information?
Where can I get an empty sim card?
Will the sim cards sold on e-bay serve the purpose for coning?

Thanks for all the answers, any extra info will also help!! :D

Julius

u just need related software & hardware to extract imsi and Ki key
sure clone has same number (coz it's clone héhé ;)
we can't add 'blocks' this way
as far i know 'originals' sims are not rewritable (masqued rom or somthing like that)
for all other question just have a look at ranked 'cloning SIM' thread