Good way to build a grid in Photoshop, Illustrator or InDesign?

[laarree]

M A V I C wrote:
[quote=laarree]
If you want to warp similarly in Photoshop, you can turn your image into smart object, the choose Edit/Transform/Warp, and manipulate the mesh. Your image and the mesh warp will remain editable ad infinitum because you are working with a smart object.

I'm using CS4 and just noticed you can't warp a smart object.
I can, even in CS3, which is what I'm using here at work. Is the feature grayed out when you have a smart object layer selected?