[Doubt] How can I create an installing disk (usb) mac os x 10.7.3 ??

Hi folks!
Well, I have the following problem...
I have bought a MacBook Air and did Boot Camp on it (I have installed Windows 7).
However, it does not work anything on Windows, due to drivers.
To fix this I need a disk (usb) installing mac os x 10.7.3 to get drivers etc.
But, it didn't come when I bought my Mac...
Someone could help me? How do I create it from the system that I already have installed?
Thank you! =D

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A Forum search yields the following two posts:
http://www.mac-forums.com/forums/apple-rumors-reports/240682-how-burn-lion-boot-disc.html
http://www.mac-forums.com/forums/os-x-operating-system/262311-clone-lion-usb-need-installdmg.html

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Crovax said:

I have bought a MacBook Air and did Boot Camp on it (I have installed Windows 7).
However, it does not work anything on Windows, due to drivers.

Click to expand...

Then you must have skipped a step when setting up Boot Camp. Refer to the instructions here:
http://manuals.info.apple.com/en_US/boot_camp_install-setup_10.7.pdf
Particularly "Step 4: Install the Windows Support Software" and "If the Windows Support Software Wasn’t Successfully Installed"