I messed up my system and need some help.

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http://forums.fedoraforum.org – I'll explain my situation and what I've done to try to fix it. I had gotten a brand new laptop, a Gateway NE56R10u just the other day and of course wanted to to install fedora which I did without any problems. I have my windows partitions on sda1-3, fedora is sda4-8. I went to update my fedora system to fedora 18 sometime had went wrong. I booted into the LiveCD and removed the linux partitions, and tried to reinstall Fedora to start over again. Well it turns out sometime during this process I scratched the fedora cd bad enough to not install properly anymore, wherever it installs a (HowTos)