I DID IT!
Finally, got the Taiwan ROM 1.10.709.01 flashed onto my EU (UK) Titan.

After the flash (release 7720) I got the 7740 and 8107 updates to give me:
OS 7.10.8107.79
FW: 1600.2200.20302.709
HW: 0002
Radio: 16.23.03.17_16.27.00.23U
Radio HW: 2.122.0.D4
Bootloader: 2.3.160015.3(134621)
Although my UK Titan was unlocked/unbranded, there was a weird bug with caller contact cards not showing on incoming calls if the number was stored with international prefix. (There was also a bug that meant no contact name was shown on incoming text messages if there was NO international prefix. Basically- the phone was handling calls and messages differently, and often I only got the number displayed

)
SO yeah, now that is fixed
After the flash, the first welcome screen is in Chinese, so you select the bottom right box (for "next") and the next screen gives you the chance to select English. After the reboot, everything seems to work as it did on the EU ROM, except that Connected Media app from HTC is still labelled in chinese, not english

But if that is the only noticeable difference, I can live with that
This is great news!!

just wondering though.. will we still need to do it through the gold card method?
I am actually looking forward to unbrand from eu to asia version
Totally possible with Goldcard method already
I will add that what took me so long (I had the ROM in late november!) is that firstly my home-made Y-cable blew my screen and the Titan went for vacation at HTC Service Centre for six weeks.
Then I kept making my Goldcard, trying all sorts of different methods to get it to work, but my phone kept getting stuck on "Loading..." screen.
I had tried reading the CID from my SD Card via my Android HTC Flyer with the Goldcard Tool, and a WM6 HTC Touch I had lying around with the PSAS tool, and weirdly the CIDs were different (same SD Card).
I tried using Hex editor to write the goldcard to the disk, but it kept coming back as not formatted...
Eventually, I downloaded an app on my tablet called "Goldcard Helper" which showed up TWO CIDs on my tablet...one for internal storage I guess, and one for my SD Card...thus, the goldcard tool was only giving me CID for my internal storage and I was trying to make that into a goldcard on another SD...
So anyways, when I finally established the correct CID, I used the online tool to generate the goldcard, then used Goldcard Tool to write it to the SD card. Then copied over the TW ROm, labelled it ETERIMG.nbh and plugged it in...no dice!
I had read someone that some female to female USB adapters are cross-over, so as a last resort I tried another f/f/ USB adapter...and WHAM flash starts.
Bit of a panic moment when the phone rebooted a few minutes in, but that seems to be part of the install process. Then it just a matter of waiting until the phone reports "success".
Sweeeeeeeeeeeet

---------- Post added at 03:19 PM ---------- Previous post was at 03:03 PM ----------
Hi,
The ROM is at final testing and will be uploaded soon
Thnx 4 commenting!!
Regards, ansar
Out of interest, what is special about the ROM you are developing?
Seems that NuMbErSeVeN has managed to unbrand with a goldcard ROM flash...and just today I managed a Asia ROM flash onto EU Titan...
If all you are looking for is to unbrand an Asia Titan to an EU one, why not just try a goldcard flash with one of the stock ROMs? If it works one way, why should it not work the other way?!?