Apple's new Lion OS stopped supporting PowerPC applications. I'd like to upgrade Photoshop CS (my current copy) to CS5. On the Adobe website, it asks me what version of Photoshop I'd like to upgrade from, and gives me a list of products including CS2-CS4, CS3-CS4 Extended, and Photoshop Elements 4, 6, and 8 (for Mac).

I have Photoshop CS. Will it still work if I purchase the upgrade from CS2?