How to install window 7 from cd on inspiron mini

You can create a custom usb install http://lifehacker.com/5793427/how-to-create-a-custom-windows-installation-dvd-or-usb-install.

If you had windows 7 before you have a hidden partition on your harddrive

Or You can buy an external dvd player
 
U have desktop remove laptop hdd and fit to desktop install using dvdplayer ,at the time of last restart shutdown system (before goto user account option )then remove hdd fit to laptop balance installation complete auto