you did buy a license for RHEL5 ?? right ??
it is not free
also why the older 5 ( need it for a specific program) and not the current RHEL6.1 - also NOT FREE
-- the purchase page ---
did you read many "how to's"
windows 7 uses a "recovery" partition that is causing all kinds of "#%H^*V?*<)NA!IU&-- bleeped" problems for everyone else
if you MUST use RHEL5
keep in mind it IS designed to be ran on a headless server and on the desktop a as an afterthought
playing music will be HARD
watching videos - VERY HARD
installing firefox 5 or 6 -- IMPOSABLE
playing most games - hard to almost imposable .
if all you want to do is give a linux distro a look i would suggest Ubuntu
Ubuntu is DESIGNED with the "new to linux" user in mind