Thank you for your prompt reply. It did not work, I have the message appear "HDR Block not recognised, error 101D"
The log is as follows

14/06/2012 09:21:45 ChipID:C900,EMP protocol:0401
14/06/2012 09:21:45 BOOTROM MODE DETECTED
14/06/2012 09:21:48 OTP LOCKED:1 CID:52 PAF:1 IMEI:35480502703504 CERT:RED
14/06/2012 09:21:51 LDR:2008-07-23 12:02 CXC1250779_DB31XX_EXPLORER_LOADER_APP_SDRAM_R2A065
14/06/2012 09:21:51 LDR CAPS:SYSTEM FLASH GDFS FILESYSTEM TA
14/06/2012 09:21:52 LDR:2009-04-21 18:09 CXC1250843_DB31XX_CS_LOADER_ACC_SDRAM_R2A081
14/06/2012 09:21:52 LDR CAPS:SYSTEM FLASH SIGNATURE AUTH
14/06/2012 09:21:52 writing "F:\Main W890i\W890_R1EA033_MAIN_GENERIC_AK_RED52.mbn"
14/06/2012 09:21:52 ALLOWED DOMAINS:BLUE BROWN RED
14/06/2012 09:21:52 MAXIMUM CID:52
14/06/2012 09:21:52 HDR block not accepted,error:101D
14/06/2012 09:21:52 Elapsed:19 secs.

Any suggestion to fix the error please.
Also the link in the tutorial to find "A2uploader" is invalid, file is not there, it is available in downloads, software, A2uploader, version v5 seems to be the one required.
I look forward to your reply.
Best regards, Martin.