howto change the file ext name xyz1002005-03-16 19:08:40

some1 told me to use windows reg editor. but how to open it and do it?
please help.
thanks

no need if u don't know. use

You guys are wrong...Look Look

grant, plz go back 2 where u c

thank you.....................

Thank you.....................

Thank you.....................

I am sure that you should go