Ok, I will shamelessly steal some info from the comments to the audio-video of the recording:

http://www.youtube.com/watch?v=CiShjSrGsPk


In spanish: Como el viento en la montaña (like the wind in the mountain)
lo encontré la última vez (i found him for the last time)
tratando de encontrar el alba (trying to find the morning)
o perdiendo la fé (or losing his faith)
En el medio del abismo (in the middle of the abyss)
el amor que no encontró (the love he didn't found)
en la noche de los tiempos (in the night of the times)
con el oro se quedó (he kept the gold)

The part in spanish is: "Como el viento en la montaña lo encontré la última vez
tratando de encontrar el alma o perdiendo como el medio del abismo el amor que no encontró en la noche los tiempos con el oro se quedó"

The parts you couldn't understand he's saying, I think

"perdiendo, lo perdi"
which means "losing, I lost him."
Then at the very end he says
"con el oro se quedo" which means "he kept the gold".

Here is a nice article on the mexican singer Salvador Duran :

http://www.tucsonweekly.com/tucson/salvador/Content?oid=2080714