upgrade IOS with linux

since im a newly converted linux user, my personal preferance of tftp server is http://code.google.com/p/tftpgui/, i assume you already know the IOS upgrade process since you googling for upgrade it using linux, but just incase you dont have a clue how to do it checkout this link http://www.routergeek.net/content/view/33/37/, on rommon http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a0080110ed1.shtml