Let me understand... you have some software that saves a file with a PP2 extension, and now you are wondering what can you use to open it?

What is wrong with the software you used to create it?

Perhaps your method of saving the file is the problem. Perhaps there is a selection in the "File>Save as" command that gives you other options for saving the file...
like, for example, a format that is native to the program?
Just guessing here, but I think it is a reasonable thing to expect, that saving a file to be able to re-open it again.

Why don't you just tell us what you are using, what program, to create this PP2 file.

Other than that, I looked up PP2 on "whatis" and the only thing close is PP4, which is a Micrografx Picture Publisher 4 format(a bitmap).
Might you be using Picture Publisher 2?
Are you trying to save the output of your "whatever" program as some sort of image that you can then send to someone who then can only print, and not edit your data?

Just curious. I don't have any answers, just questions. Sorry.