Cannot boot up in mac os after failed attempt

I've literally just opened up my new 24" imac and everything was running fine.
I used boot camp assistant to try and install windows xp on my computer.
After partitioning, I inserted a windows installation cd and clicked the last button in the boot camp asssistant and my computer restarted.
As expected it loaded up in a DOS-like window and I was prompted to install my cd of windows.
I'm guessing I didn't have a proper windows xp cd because it came with two cds. It began installing windows from the first cd, but I had to insert the second one to complete installation. Since there's no real way to eject a cd on the mac aside from the keyboard I had to cancel my windows installation.
At this point all I could do was force shutdown the computer and now whenver i turn it on it loads into the dos-like window and I can't load up mac os.
If anybody could help me out or at least point me in the right direction, it would be a greeeeeeaaaat help! I'm just bummed I was stupid enough to screw up my new imac an hour after opening it
Thanks!

Restart the computer with the X key held down, or with the Option key held down followed by selecting the Mac OS X system in the list, clicking on the button with the straight arrow, and then changing the startup disk from the Startup Disk pane of System Preferences.
(26789)

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I cannot boot up my Mac book and all I get is a long beep

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Bill, Healdsburg, CA
Woodcarvings: www.picturetrail.com/chips
Date: Wed, 9 Sep 2009 02:21:27 -0600
From: [email protected]
To: [email protected]
Subject: Cannot Delete Adobe Reader 9 Installer after failed download
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The deep search finally finished:
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MS Data                338695552 651468152 312772601
   MS Data                340391264 653163864 312772601
   MS Data                490233848 803006448 312772601
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D EFI System                    46     409645     409600 [EFI]
D MS Data                 12844161 247217280 234373120
D MS Data                 25922952 338695552 312772601
D MS Data                 27618664 340391264 312772601
D Mac HFS                 97104348 235516637 138412290
D Mac HFS                 97154892 235567181 138412290
D Mac HFS                174921356 176190891    1269536
D Mac HFS                174921727 176191262    1269536
D Mac HFS                174921894 176191429    1269536
D Mac HFS                174922198 176191733    1269536
D Mac HFS                174922470 176192005    1269536
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Hi,
Do you get the error message like "Office <Update version number> can't be installed on this disk. A version of the software required to install this update was not found on this volume. To learn how to fix it this issue, see "I can't install Office
for Mac updates" at http://www.microsoft.com/mac/help.mspx."
If it was, please follow the kb to fix the issue:
http://support.microsoft.com/kb/969065/en-us
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http://answers.microsoft.com/en-us/mac/forum/macoffice2008?tab=Threads
Regards,
George Zhao
TechNet Community Support

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Cannot boot up in mac os after failed attempt

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