How to move a lead to converted

How to move a lead to converted

Hi Guy's, 

A complete newbie here so please be patient :) 

Basicly I want to create a form "new lead" in that form it will have a drop down status with the following options

>Contacted
>Converted
>Not intrested

When the drop down is changed to "converted" I would like to move it to another form/view "leads" and on moving it to this new form it will allow me to enter further info. 

So I have created a form "new leads"  and created a form "converted" how do I get the data to move from new leads to converted?

Thanks
Daniel