your bootcamp is which version?
there should be an option to allow burning of disc.
and a option that is grey-ed out for using usb installation.
Boot Camp 4.0.3. I'm running OS X 10.7.4
I think it's a difference from the Air's to the ones that have a disk tray (iMac and MBP).
Anyway, if you have a DVD you could just burn it. 1. Download the drivers, save to a usb stick. 2. Install via the dvd. Then you are all good?
if you are using air or any mac with no superdrive, then the usb option will be enable else it is disabled. however you could enable it manually be editing the plist to "tell" the system that your mac does not have a superdrive.
Which plist should I edit?
if your usb option is disabled, go to /Applications/Utilities/Boot Camp Assistant.app/Contents/info.plist
add in your mac model into the array for USBBootSupported Models
<key>USBBootSupportedModels</key>
<array>
<string>IM130</string>
<string>MM50</string>
<string>MP60</string>
<string>MB80</string>
<string>MBP90</string>
<string>MBA40</string>
</array>
How do I know what model?
<key>DARequiredROMVersions</key>
<array>
<string>MBP81.0047.B27</string>
<string>IM41.0055.B08</string>
key>USBBootSupportedModels</key>
<array>
<string>MBP81</string>
<string>IM130</string>