How can I download photos on my ipod touch?

How can I download photos on my iPod touch? Do they have to be from a file on my computer? If so, how can you get your photo application to recognize your iPod so you can sync them?

Hi,

Photos are synced onto iTouch through iTunes

That's the only program you need---no other photo applications will recognize the iTouch.

Okay thanks, but how do I get my photos onto iTunes?

I think, it should be just a matter of opening up iTunes, and going 'Import to Library' - don't quote me on that though, I've never imported pics to iTunes...