Implementing a form

[eluser]RS71[/eluser]
Hey

I was wondering if you guys could point me in the right direction in regards to implementing a 3 step form. (1. Details, 2. Photos, 3. Confirmation)

The form is used to add new 'entries' to my app. I'm unsure on how to go about doing this - how would I link all 3 portions of the form? At the moment since the first part doesn't have any identification, I think I'd have an ID in a hidden field and use that to link to the other two portions of the form. Something like this perhaps:

1. Details            http://localhost/entry/add
2. Photos            http://localhost/entry/photos/r7dj9c
3. Confirmation  http://localhost/entry/confirmation/r7dj9c

Another concern I have is the user using the back button to correct something in first portion of the form. I think the hidden field with the ID would help in updating the entry rather than adding another if the user submits the form again.

What do you guys think?
Any help is greatly appreciated.

Cheers