MacBook don't boot after disk repair from recovery

Hi,
a few hour ago for a very little problem with finder (view previous discussion) and just for a curiosity i've checked my disk with disk utility and i've found some errors on the main disk. When repair is finished i see a message that say that is necessary to boot in recovery mode for completely repair my disk.
I booted from usb installation of mountain lion and select disk utility, check disk, start to repair it and at the end i see a message that say the disk can't be repaired and is important to make a backup of content, initialize it and reinstall OS on it but when i restart my mac, this will not boot anytime. I see an horizontal progress bar (moooore slow) and after complete the progress bar i see the circle spinner turning but don't start (also after 30min).
What can i try for solve this problem???

A long shot, but try to boot into the Safe Mode. If you can get it to boot make some sort of backup either with Time Machine or a clone. Then do as Brandon suggested.
Safe Mode
Safe Mode - About
Clone - Carbon Copy Cloner (Often recommended as it has more features than some others)
Clone – Data Backup
Clone – Deja Vu
Clone - SuperDuper
Clone - Synk
Clone Software – 6 Applications Tested

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Hello Everyone,
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Message was edited by: Anon87
Message was edited by: Anon87
Message was edited by: Anon87

The question mark means that important system files needed for startup are either missing or damaged. The only solution is to boot from your Installer DVD and perform an Archive and Install or an Erase and Install.
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Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
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2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
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5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
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After installing the 10.5.2 update via software update (from 10.5.1) my macbook will no longer boot. I get the Apple logo for about 5 seconds then I get the 'You need to restart your computer' message. I can't get past this point. Any suggestions on how to get my laptop back to life would be appreciated.

Start by:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now shutdown the computer for a couple of minutes and then restart normally.
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1. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
2. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
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4. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
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http://docs.info.apple.com/article.html?artnum=106214
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