|Do you have the Microsoft office install disk?|
Do you have a network connection between your desktop and the Acer?
If so you may be able to copy the entire instal disk content onto the Acer harddrive and perform the instal from there. Not sure if it will work that way. My other suggestion would be to download open office onto the acer harddrive and instal that instead. I believe it includes an excel compatible spreadsheet prog.
Goin' Fishin' (Some day)