K4 USBNetworking with KUAL [non-conventional]

About a week ago, I posted here asking about missing gtk libraries on a K4-NT when attempting to launch KTerm from KUAL. I learned that I needed a touch-enabled device.

Now, I've got a K4 (Touch). However, I'm having the hardest time getting usbNetworking on it.

Steps:
- Jailbreak
- Restart to enable MKK
- Add KUAL file to "documents"
- Launch KUAL
- Upload Update_usbnetwork**.bin
The "Update Your Kindle" button is greyed out. Further, all Update_**.bin files are removed immediately after unmounting the kindle.
- Install KindleTools and follow instructions to convert and extract from .bin files
- Upload the appropriate usbnet folders to root of kindle and extensions (for use in KUAL)

After all that, I'm stuck. Using the USBNetwork Kindlet from KUAL, I "Toggle USBNetwork". However, plugging in USB defaults to file transfer mode regardless.

Any tips for getting USBNetworking going? Also, any ideas why Update_**.bins are not working?