I cannot share the contents of the upgrade disk, as I think it violates MobilitySite's warez rules.
But I can tell you how to extract/convert an .img to an .nb0 and .crc.
Find your .img file and then download this:
IMG2NB0F.exe - Windows Live. (It's hosted by me, don't worry, no malware).
Browse to the .img and press "DO". It will convert the .img to a .nb0.
Now, you need a .crc:
Download this:
CRC_calc.rar - Windows Live. Press the left button (I can't read the buttons, I don't know if you can) and browse to your .nbo (NOT IMG) file. It will give you a .crc.
Now the name of the .crc is important. Open up notepad. Copy the crc given to you and type/paste it onto Notepad (It should be 8 digits/letters). Now, look at your .nb0 file.
It should be
blahblah.nb0.
Now use the same file name but change it to
blahblah_nb0.crc.
For example (DO NOT use this):
My file name is DiAd_K_AximX51_WM5_A05EN.nb0
My crc would be called DiAd_K_AximX51_WM5_A05EN
_nb0.crc
Now you have a .nb0 and a .crc ready to go.
BACKUP EVERYTHING. Because your device will be returned to manufacture condition first. So backup all data and get a list of all programs installed. Pop the two files onto a blank SD card (formatted FAT).
Flash it. If you don't know how to flash, be sure to ask us.
~John