Can I put a shoutbox on my website? I am on shared hosting and the program is called “ShoutPro”. The program would be hosted on the site.

I see no reason why not.

That being said, please make sure that the shoutbox doesn’t automatically reload itself. We’ve seen some issues caused by shoutbox scripts that automatically reload themselves every 10 seconds or whatnot — this drives up load on the server significantly, particularly if someone leaves the page open on their computer.