Issues
Please for the sake of saving yourselves a crap ton of wasted complaint time... Do NOT "upgrade" to Windows Vista... This is planned to be used with new installations and is designed to operate with newer Dual core technologies... Yes, It probably did install and may have worked for a time on your older machine but would have caused performance. After a bit and most of the bugs get worked out you will see the system requirements for the software dwindle down under a Gig of RAM. Even XP was extremely high maintenance until microsoft raped it with 4000 critical updates. Just because software is new and available does not make it good.
A fine example is Internet explorer 7. IE7 is not even authorized for use in most companies because it has issues dealing with upper level software (SAP, ORACLE, AGILE, ETC...)
Please becareful what you jump on to use... You will take notice very quickly that the best systems are the ones you dont play with.
V/R
Steve