[7" Kindle Fire HD Q&A, Help & Troubleshooting] JeremySwagS:
What about this method?

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Methods for Enabling Fastboot Mode

Realistically, there are 3 potential methods of enabling fastboot mode on a working bootloader. There is a 4th method, but it should only be considered as a last ditch effort because the case must be opened for access to the motherboard. Let's cover the first 3 methods...

Factory cable - Using a factory cable is the most straightforward method of enabling fastboot mode on the Kindle Fire and it will work with any bootloader. With the device off, plug the cable into the Kindle Fire, then the computer and the device will boot up directly into fastboot mode. No other user intervention is required.

Temporary fastboot mode - The FireFirefire custom bootloader temporarily enables fastboot mode for a short amount of time. Issuing a fastboot command like...

Code:

fastboot getvar product

to the device during this time will stop the fastboot countdown and enable fastboot mode indefinitely. If the device displays a plain white and orange "kindle fire" logo, the stock bootloader is installed. The stock bootloader does not enable fastboot temporarily, so another method must be used.

Bootmode setting - The Kindle Fire has a bootmode setting that indicates to the bootloader how to proceed in its booting process. One of these bootmodes (4002) will tell the bootloader to enable fastboot mode. The bootmode setting is recognized by all bootloaders, so even the stock bootloader will go into fastboot mode when the bootmode is set to 4002. The only place this feature is likely to be used is from the system software, but there's a catch. The system must be able to provide access to a shell prompt.

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Referred to here. http://xdaforums.com/showthread.php?t=1668159

While I consider myself a rather advanced android user (I rooted my 1st gen kf w/ twrp and flashed cm10, rooted my gf's nook color w/clockwork mod and flashed cm10 and cm8, and rooted this fire hd no recovery or rom yet) i know only the basics about windows and phrases like...

"The only place this feature is likely to be used is from the system software, but there's a catch. The system must be able to provide access to a shell prompt."

...have me very confused. When I'm trying to enable fastboot am I not using two systems? The windows and the fire. So which system must be able to provide access to a shell prompt? I have been up all night trying to get Android SDK up and running so I have the ability to input, to the fire, fastboot commands. I downloaded the sdk from here.

http://developer.android.com/sdk/index.html

I am, honestly, flying blind here. I'm not even certain that this is the right program I need. I have been following this guide...

http://www.youtube.com/watch?v=Yc4z-KYypgY

I like the You Tube video tutorials because they are easier for me to follow, no offence to XDA. I have used XDA extensively in the past, but this is my first "brick" and, honestly, I NEED this kindle to work! I depend on it daily! I believe that once I can get into fastboot I will be okay. I have installed recovery, and roms before, but never even heard of fastboot till yesterday. I just can't afford to wait for a modified cable to come in the mail. I really would like for this to be done by tomorrow morning if it is at all possible.

I would also like to say thank you to everyone that has helped be this far. I truly appreciate it.

-edit-

I'm attempting to use the 3rd option, Bootmode setting.