@xl97
I have read your post, but I didn't really looked at these links, anyway your Nokia cable may look like this one:
As you know there are so many kinds of those cables and I have also seen same hack of this kind cable with a
on board chip too. Some of them has labeled (TX, RX, DTR,...) on board but I guess yours has no labels!
We could much better see it, when you have upload a picture of your cable (board)