Hello

I recently took some images of birds in the sky,the bird turned out well but the sky turned out awful-blown out white.

Its been suggested this can be fixed-but how is it done?? I only have CS 5 and canon DDP,I thought CS 5 was an advanced
PP tool,but when I get pointers fro others,and go to use them,there appear to be not many tools the same in CS5

Might look at buying a better PP tool,any suggestions?Really struggling with all this PP bit.