Setup my MAC/Xcode for App Develoment

Hello All - I know this is going to sound a bit ridiculous, but I am rather clueless when it comes to MAC systems and getting everything setup and operating correctly. I have a MacBook and I am a registered iPhone Developer. Although I am a Certifed MCSE with Microsoft and have several apps for sale in the app store, I truthfully have NO idea what I'm doing when it comes to the actual software setup on my machine. I need help... I need someone to login to my system via TeamViewer (which I will supply you with login credentials after project is awarded) and properly install the Apple's Xcode software. I had it installed and had been developing iPhone apps okay when I decided to download and try the newest version. That, of course, threw everything off and now I've gotten things kind of messed up. So, I need someone to straighten things out...get XCode back to it's proper setup and also ready for app design and app store distribution. Confirm configurations, development certs, deployment settings, etc. In addition, I'd like this person to review my developer account and make sure that all Developer and Distribution Certs are properly downloaded and in the right place. More or less, it's just a quick housekeeping job that shouldn't take much time for someone who is qualified in the field. Please let me know your credentials when submitting your bid. Thank you, Ellie