You can't install it to a hard drive in the same way as other operating systems but if your netbook has an internal drive then you can copy the ISO directly to the drive in the same way as you would copy the ISO to a USB drive. This will keep the "amnesiac" traits in place as it is just acting like the internal drive is a read-only CDROM (we are essentially copying an ISO to the drive, and CDROM file systems are read-only).
Follow these directions but do it while Tails is running from a USB drive and substitute the destination as your internal drive (usually /dev/sda or /dev/hda):
In short the dd command would look like this (sdc is your USB drive, sda is the internal HDD):
dd if=/dev/sdc of=/dev/sda bs=1M
Edit: In case you're wondering if this actually works, it does! I just used this method to create a VM without using a virtual CDROM drive.