I have a Senao NL-2511cd Ext 2 with firmware 1.8.0.

I've read that firmware 1.7.4. the best is to use with backtrack.
Now i know how to upgrade the firmware (using Winupdate)
But i can't manage to get it to 1.7.4.
I googled and find out that downgrading isn't always possible.

Does anyone know how to downgrade this card from 1.8.0. to 1.7.4. ????

I would really be pleased!
Thanx in advance.