Edupup
I had Puppy Linux already installed on the Omnibook but, since I had found a education-tailored distribution on this Italian LUG page, I decided to install it over the (still unused) previous installation. The distribution is a bit old, last update is in 2010, but is not a vital detail since my computer is far more old than the distribution. Speaking of specialized versus general purpose distributions I often prefer to start with a general purpose one then install the software I need. In this case I instead I decided for installing a specialized one since I'm not fully used to Puppy installation mechanism and having a distribution with some software already installed could save me some time.
Installation
Puppy Linux installation is simple but sometime it might result tricky. My thirst Installation tentative concluded without error messages but it refused to start in any way (even by booting from Edupup CD) I suppose that it was because the previous Puppy installation on the same disk that the installation wizard did not clear. I formatted the disk and then repeated the installation, everything went eventually fine.