From xda. I followed this to a T and after about 20 mins I was all set. Works flawlessly.
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Well, first, before I realised I could do it, I downloaded the newest version of Kies because I got all kinds of errors when i did a kies software update from the older version. I had to uninstall it from my computer and install the newest one. I got it from here:
Transfer, Sync & Manage Music, Movies, Photos, Contacts and Calendars with Kies
btw, I did all of this with the phone completely stock - restored to unrooted KH7, then did OTA KK6 upgrade. NOt sure if it would matter since you will start in download mode anyway.
after completely finishing installing kies (and it took a while) i shut it down and then made sure the computer detected the phone in different modes (usb debugging on And off, and in download mode.) it will install the drivers when you connect it in each mode.
now, WITHOUT the phone connected, start the new Kies and went to the tools menu. Chose Firmware Upgrade and Initialization. It asked for the serial number and model number that I got from the sticker under the battery. Now, put the phone in download mode (either with a jig, or holding vol. up + vol down and inserting usb cable).
After you enter the serial number and model number it should say that the latest recovery version is the LE5 (the new firmware). Now, just leave the phone connected and keep clicking through with OK. It should download the firmware, and when it is finished downloading you will see the green bar moving across the phone when it is installing.