Heres my problem:

-I dowloaded a free trial of " Microsoft office powerpoint 2007 "
and dragged it to my USB card.

-The computer that i need it to work with has the old powerpoint. Like 2003 or something. How do i make it work ?

- Someone told me i have to change the file type. That didnt work and it didnt give me the option for the older powerpoint that i used to have.

- Please help !