Help with genotypes again.?

That's right. The easy way to do this would be to do each gene individually then use the multiplication rule (the idea that each "event" must happen). So for A, it'd be like an AaxAa cross. The chances of getting aa from that cross is 1/4. The chances of getting bb from BbxBb is also 1/4 as is cc. You use the multiplication rule to get 1/64 (1/4 x 1/4 x 1/4 = 1/64). So take the chances of each event happening (one gene at a time) and multiply them together.