Reformatting hardrive from time machine backup

[Tyrantking]

HELP with new hardrive setup
So I just installed new memory and a larger hardrive on my wife's macbook. We have the old hardrive and an external where we backed up to with Time Machine. So I went and did the hardware installs and no problems but I received some miss information on the web and didn't realize that I just need to boot from the external. So I put in the OS disc and couldn't get it out without going through the process of installing OSX on the new hardrive. So now I have a like new macbook but without the stuff on it from the old drive.

1 How do I erase and reformat the new hardrive so i can start from scratch with the time machine backup from the external drive.

Thanks

 

[spinnerlys]

You don't need to erase the newly installed OS, just go to Applications / Utilities / Migration Assistant and connect your Time Machine HDD and choose what you want to restore - applications and user data (your account(s) - home folder).

Read the following for further information: http://support.apple.com/kb/HT3322 .