Any hint?
By the way do anyone have suggestion about a nice distribution I could
install on that laptop?

From Wikipedia, https://en.wikipedia.org/wiki/Physical_Address_Extension:

Distributions that still provide a non-PAE option, including Debian (and derivatives like LMDE 2 (Linux Mint Debian Edition)^[27]), Slackware, and LXLE typically do so with "i386", "i486" or "retro" labels.^[28]^{[29]

I'd suggest LMDE2 could be a good candidate (with xfce desktop).
I have used LMDE before and was quite happy with it.

Cheers,

Daniel.}