Given it is a NetBook, I presume you will be predominantly wifi.
However, be aware that the wired driver installation process will need to be repeated each time you upgrade your kernel.
Just change the line:
$ cd /lib/modules/2.6.28-11-generic/kernel/drivers/net/atl1e/
i.e., starting at the directory containing the untarred (uncompressed) driver:
$ cd /lib/modules/$(uname -r)/kernel/drivers/net/atl1e/
Hopefully, that should work.
sudo make install
cd /lib/modules/$(uname -r)/kernel/drivers/net/atl1e/
sudo insmod ./atl1e.ko