How to Upgrade Treo 750v using a Mac ?

[Innovest]

I've been on the web for hours, trying to learn how to upgrade a Treo 750v to WM6.
Thanks to XDA, I think I've got it worked out ...
1. download the ROM
2. extract and rename the .nbh file ***
3. put the CHEEIMG.nbh file on a FAT SD card
4. run the bootloader
5. hard reset.

OK - looks easy ... EXCEPT ...
I dont have a windows PC (OK - so I'm a Mac user), so how can I extract the .nbh file from the .exe file ?

OR - can anyone post a link to the .nbh component of the GENERIC ROM which I found at ...
http://palmone.r3h.net/downloads.palm.com/Treo750_2_23_ROW_EN_DesktopUpdater.zip

Assuming that the .nbh file is all I need ????????

[Innovest]

OK - I'll answer my own post ...

1. Download the ROM
http://forum.xda-developers.com/showthread.php?t=335402&page=8
2. Borrow a PC to extract the .nbh files from the .exe file.
3. Rename CHEEIMG_FW.nbh to CHEEIMG.nbh
4. Format an SD card as FAT32.
Amazingly, WM5 doesnt contain a utility to do that.
Use a PC and do it from Windows (provided the PC has a SD reader).
5. Copy CHEEIMG.nbh to the root level of the SD card
6. Back up all your Treo data
7. Insert the SD card into the Treo
8. Hard reset the Treo (Reset + Power button -> erase all data = Y)
9. Press Media + Soft Reset -> bootloader mode
10. Follow the prompt -> hit the Power button to start the update
11. Wait about 10 minutes -> done
12. Reset the Treo

BINGO - WM6 is up and running !
I used the generic ROW English ROM ...
So my Treo is UNLOCKED - no Telstra splash screen - great !

Phone works - internet works - BT works ...
Only problem (so far) seems to be that all Treo-generated sound (such as Screen taps - which all worked fine initially) has now been muted.