no one help me but I got the answer it is quite simple.
1. unplug, remove the battery
2. open the long rectangular memory chip cover which is at the back or bottom of the laptop.
3. at the end of retangular, you will see an arrow mark on a plastic piece at the end of retangular panel
4 right next to it, there is screw, need small philip screw driver to remove it.
5 open the DVD drive by using a pin gentle push into a tiny hole next to the botton. it will mechanically open not electonically since you unplugged it already
6. gentle push that arrow piece as show in #3
7. it will come out.
8. replace it with new DVD run
9. reverse the procedure.
referred to dell technical support site
http://support.dell.com/support/edocs/systems/ins2600/en/sm_en/upgrades.htm#999869
kent shapiro, September 2006
