[oXygen-user] XML Author: how many images can Oxygen process?

I am using oxygen to create a print book on docbook with XEP. I'll be adding about 50 or 60 (or more) 300 dpi screenshots, most in the range of 1 - 1.5 mb. How many images could my Docbook project theoretically have without straining RAM and system resources considerably? Will Oxygen or XEP choke at some point? -- Robert Nagle