Multi page form

I need your help. I am currently working on a registration form and descided that it is too large too fill in with 1 go.

Any of you have experience with this? I have done it once years ago since I dont really like it.
Now I am going to force validtion on each page before you can go to an other.

What I am stuck with is. do a partial save in a temp table or so and on complete create the user. or just one post at the end.

btw the registration is similar to those on dating sites.