Office 2003 Excel spreadsheets in 2 different windows

I would like to view 2 different spreadsheets in 2 different windows such as one on one monitor and the second on a different monitor so I can do side by side comparisons of the docs. I don’t want to split the window as the company cannot afford to get me a mega-monitor so I can read them separately. I am tired of printing them out and covering my entire desk and/or clicking around constantly to check the rows. Any way I can get Excel 2003 to NOT insist on opening all Office Docs in one window?