Following Alyssa's great post , Michal Pelszyk make a very profitable comment :

There's easier way using bootable Linux CD. Boot from it (note: pure text interface is enough). 

When it finishes loading: 

cd /mnt 

mkdir acer 

mount -t vfat /dev/hda1 /mnt/acer 

cat /tools/aimdrs.dat 

voila, your password. 

Warning: on newer notebooks with SATA drives replace "hda1" with "sda1".