HELP! Deleted "wheels" user - how do I fix?

Hello,

I am running OS X Lion 10.7.4...

So I just did a big clean up on my hard drive of old files, and wanted to see how much space I now have left on my HD - I right-clicked on Macintosh HD > Get Info.

Under Sharing & Permissions I noticed a strange User listed named "wheels". Afraid that someone had accessed my computer or was somehow sharing on my network, I went ahead like an idiot and deleted the "wheels" user without first researching what it was all about.

After deleting "wheels", I went to Google to read up on it and realized I've apparently made a big mistake, and that the "wheels" user is somehow significant.

My computer appears to be operating fine so far - though through reading up on it, deleting "wheels" can cause some big problems. I've been trying to find a way to restore the "wheels" account and have had no luck so far.

I tried a suggestion to restart holding CMD+R and Repair Disk Permissions, which I did - upon reboot the computer seems to be functioning fine but the "wheels" account is still gone.

How can I fix my stupid mistake? I realize I shouldn't have deleted it - but now it's done. How can I restore "wheels"?

Any help would be much appreciated!!

Thanks