Installing Windows 7 Macbook Air

Question

Hey all,
I've been working on this for days, and I've been trying to install Windows 7 Ultimate (64 bit) onto my MacBook Air I bought last year. I'm having a problem with Bootcamp assistant though; whenever I tell it to create a windows 7 install disc, it says that I need a USB drive connected to the machine. I did this, reformatting a USB key as a windows partition, however when it was done, Bootcamp assistant just closed and left me in the dark as to what to do next. I have blank, rewritable DVD's, a windows 7 ISO image, pretty much everything I need, I just want to install it "normally", and without a USB drive. Any clues as to how to proceed?
P.S.: I did this on my MacBook pro last week, and it works fine. I didn't need to use a USB drive, I just burned the ISO image to a disc first with Disk Utility, then followed the manual and onscreen instructions.

Answer 1

There are a few others like this with pictures but can't remember where. Look for @jacktourist's post, it should be page 2.
In order to get around the Authentication/permissions I just right(option) clicked the plist file, select Copy "Info.Plist", clicked on desktop, right click Paste Item then opened the file (in TextEdit) and added my info to the top of the list, saved, then dragged the info.plist from the desktop backed to the Contents file, authenticated, then Replace, and all was ducky.
I has to be opened or saved as PlainText in order for it to work if using TextEdit if you get the "Can't save as rtf" error.
Should look similar to this. Some people have to add theirs to the bottom OR the top of the list in order for it to work.
<key>USBBootSupportedModels</key>
          <array>
                    <string>MP51</string>
                    <string>IM130</string>
                    <string>MM50</string>
                    <string>MP60</string>
                    <string>MB80</string>
                    <string>MBP90</string>
                    <string>MBA40</string>
          </array>
</dict>