If you knew how to run Solaris in the first place you would know that so whats the point? You want to know if you can run an OS you don't know how to use?
Solaris is for RISC CPU's yes but not the PowerPC specific architecture.
Sorry if I seem a little rude but it seems a lot of people make threads to answer questions that you could answer in a 5 sec. google search. As if we are here to answer whatever question that pops in your mind about something you will likely never attempt. JoshuaRocks is the same type of poster.
Many of us here know the things we know because we actively go learn about them throughout our life. We don't just ask other people what we can find out on our own in 5 sec. Google is your friend.
How many more "Can I run (insert random OS here) on my PowerPC?" threads do we really need to see?