[Koha] printing circulation slips

Hi there all! I need some guidance about printing circulation slips with Koha... Id need Koha to print a slip every time an item is issued... and, more important for our borrowers, every time an item is returned... Is there anybody printing such slips? How must I configure my Koha server so the clients could choose a printer locally connected to them? I've already created one default Printer (lpr) and turned on printing on system preferences.... and now... what? Thaks in advance! :) -- J. Martin Longo Informatica SID - UNCuyo http://sid.uncu.edu.ar