Thanks guys
IMPORTANT Do not forget to create (or edit) the customdevices.txt file in the GQ4x directory and add the lines i've written in the 1st post.
Because the 29F080 description for the cards is not the same as the 29F080 already available in the list.
With the Willem programmer, you'll need to move the jumpers for 29F080 / 39SF040 - 29F040.
To prepare your files before flashing,
use my little app available in the 1st post (named huconv v1.5)
it will remove header and generate 2 files (for US and JAP hardware)