Just to clarify, I have a screen print program (PDF Creator) and it creates a PDF when I select print.
If I try viewing the file, it views well in Adobe Reader on the scope, but, the only minor issue: I can't zoom in and out by holding the CTRL and moving the mouse wheel (a new version will solve that).
I am, however, thinking of this wrong. The PDF Creator program will only produce PDFs, installing a newer version of Reader won't change anything unless I update the PDF Creator and that creates an unreadable version with Adobe Reader 5 (which may or may not happen).
Also, I don't really need Adobe Reader on the scope, but it is nice to have it to look at PDFs should I need to reference. If I do upgrade Adobe Reader, it needs to run on XP, and with SP1 ONLY (I don't want to even attempt, or waste my time, installing SP2 and/or SP3).