1. Copy all the files from an OS CD to your PC hard drive.
Well, you can bin the Mk2C Mk2M langMk2 and the V_2 directories. You don't need them for Mk3.
You can probably bin more but I didn't bother.

2. Locate the usw_load file - this contains the text and graphics for the nav system.
My file was in Mk3116BMWC01Sapp_sw
You'll note there are 4 x directories under Mk3. My car loaded the 0116 files. But if you're not sure which dir your car will load, change all usw_load files.

3. Use NavTweak and edit the usw_load file the way you like.
NavTweak is here:
http://rapidshare.com/files/8925524/navtweak.zip.html
I used NavTweak v2.6
I also changed some of the menu text to the way I like it :-)

4. Use a hex editor and edit the software version to be greater than what you had before, or to 0000 to get so-called "wild" release to force upgrade. I made v6.40
Change version in first 4 bytes of...
sw_rel.tbl
lng_rel.tbl
...both located in Mk3116BMWC01S directory

5. Make a new CD image with all the modified files.
Here's the important part:
You must make a Mode2/Form1 image. This is CRITICAL.
Most CD burning programs make Mode 1 images
The Mk3 cannot boot from a Mode 1 image, it MUST be Mode 2
Try and boot from Mode 1 and it will go into an endless loop, leaving you struggling to get the CD out.

I used mode2cdmaker, modified to write the correct TOC.
Volume must be called NAV_SW
I will post this modified version soon.

Command line was
mode2cdmaker.exe -o "image" -v "NAV_SW" -e "dat" -ccd -f
I used m2cdmgui.exe (UbiK mode2cdmaker GUI v1.6)

6. Burn a new CD-R with the image. Don't bother with CD-RW, the Mk3 nav cannot read them.
Burn at the SLOWEST speed and verfiy you have a 100% burn afterwards.
Mode2 has much less error correction than Mode1, a verification is important.
I used ImgBurn because I can verify the burn afterwards.
Get it here: http://www.imgburn.com/
ImgBurn also shows that the image is MODE2/FORM1 - check it!

None of my discs were 100% but I only had a total of 9 errors so I tried them :-)
Make sure you can read the discs in your PC.

7. Go to the car, ignition at first position (radio on etc), wait for nav to boot up, then remove map CD, and insert new OS CD.
Wait for system to load new software.
Do NOT turn ignition off until reload and reboot has been completed.

8. Enjoy!

Tips:
If your Mk3 cannot read the CD, it'll go into an endless loop.
To eject the CD, turn ignition off, wait a couple of minutes, then turn on and keep pressing the Eject button, until the CD comes out.
Then try again with a good Mode2/Form1 CD

Voila!

• Change Splash Screen on Mk3 - I did it! (pic) - kiwijochen 2006-12-25 20:12:05 (7238 views)
  • Not to be a party pooper, but instructions for this have been on X5world for - Stygian7 2006-12-27 19:14:52 (1553 views)
    • This (these last couple of weeks) is the first I've heard that you - sealbeach740 2006-12-27 21:44:25 (968 views)
      • I did it on an MKIII as well...same process as I used to do it on the MKIV. I - Stygian7 2006-12-27 22:15:27 (1002 views)
        • Re: I did it on an MKIII as well...same process as I used to do it on the MKIV. I - catoboss 2006-12-28 19:29:25 (775 views)
          • Well, maybe mine was a freak accident, but I certainly didn't make it up... (nt) - Stygian7 2006-12-29 11:02:31 (650 views)
  • Excellent work. Can you make an ISO image for us that - davidc 2006-12-27 00:32:35 (877 views)
    • Sure. What else do you want on the logo? - kiwijochen 2006-12-27 01:05:19 (680 views)
      • Any of these logos would be great. (pic) - davidc 2006-12-28 16:33:16 (1439 views)
        • Here's some samples (pic) - kiwijochen 2007-01-08 22:42:36 (1380 views)
          • Cool! I like #4. (nt) - davidc 2007-01-08 22:49:03 (457 views)
        • Do you want Mk3 only? Or Mk3 and Mk4? - kiwijochen 2007-01-02 04:05:59 (625 views)
          • Sounds great. Let's do both III and IV. I still have MkII but one day - davidc 2007-01-02 16:02:59 (452 views)
  • Also is there a max file size for the .gif like the MKIV? (nt) - visionbmw7 2006-12-26 06:12:36 (528 views)
    • Dunno. I replaced a 9kb GIF with a 46kb GIF and it worked :-) (nt) - kiwijochen 2006-12-26 15:30:59 (629 views)
  • Sweet! Never say, 'NEVER'! (nt) - visionbmw7 2006-12-26 06:10:12 (534 views)
  • Here's the instructions in brief (url) - kiwijochen 2006-12-26 03:16:00 (11871 views)
  • very cool, I for sure will want to do this to my mk3 (nt) - itsstock 2006-12-25 21:05:57 (562 views)
    • You do it first to make sure, then I'll do it. LOL! (nt) - visionbmw7 2006-12-27 17:36:22 (453 views)
      • Re: You do it first to make sure, then I'll do it. LOL! - catoboss 2006-12-30 23:15:14 (442 views)
        • Correct, without special mode2cdmaker TOC will be wrong (nt) - kiwijochen 2006-12-31 06:35:00 (650 views)
          • Re: Correct, without special mode2cdmaker TOC will be wrong - catoboss 2007-01-02 00:20:38 (591 views)
            • LOL! 46 CD-R - I only went through 10 :-) (nt) - kiwijochen 2007-01-02 04:06:50 (599 views)
            • You have email (nt) - kiwijochen 2007-01-02 02:29:45 (546 views)
              • Re: You have email - catoboss 2007-01-02 13:01:08 (517 views)