Adding Macs to a network & sharing Power

Hello,

I was hoping someone could shed some light on a question I have regarding adding Macintosh computers to a PC network. The Macs are both OS 9 and OS X.

How much effort is involved in accessing and sharing PowerPoint files between PCs and Macs on a network?

The Network will be either Novell or NT. I am most concerned about additional software or configuration headaches that may be needed.

Thank you,

Randy