The problem with taking a power supply apart is that if you don't know what you're doing, it's potentially lethal... Has someone pointed that out yet?
Groovy, if you can't afford a new PSU, you always have the option of dumpster diving! :) Check out some of the dumpsters around Best Buy and other stores like that. Sometimes you can find some decent hardware.
Though, power supplies really arn't... all that expensive (
http://www.newegg.com/app/ViewProduct.asp?catalog=58&DEPA=1&submit=property&mfrcode=0&propertycode=&propertycodevalue=3803) to begin with... Come on man, you're living at home and you're employed. You can't afford 60 bucks? :¬:
Although, even if it's making a noise, that may not even be anything other than an annoyance. Just have a backup plan in case it decides to die. ;)