Hi Catymag, thanks for your links, but please help me a little more, what I did was download the first link and put the xml file in a pen, on my PC. After that I run Basecamp and say "no" to the question it makes at the beginning...
After that I must download an image with Basecamp and send it to the pen, correct?
But then must I patch the Oregon 450 firmware? Which firmware must I use? How can I do it (it's the first tme I patch a firmware)?
I saw that I can download a file called GUPDATE.GCD, is that the firmware? Where must I put it?
And if the unit doesn't initialize, how can I put back the old one?
I saw in my 450 that I have the 4.50 software.

Sorry because all my doubts, but i'm a little inexperient with this stuff and my Englsih isn't also very good...

Thanks