I'm putting together an old Mac for my sister just for homework. I have a VERY old PowerPC 7200/120 to fix up for her and put on Mac OS 9. But she needs MSN Messenger. On the Microsoft Mactopia website they have it for Mac OS 9.2, but on theapplemuseum.com they say that the PowerPC 7200/120 only supported OS 9.1. Is there an older version for Mac OS 9.1, or could I run OS 9.2?