I am setting up a site where all products are virtual but I may add an option to have items delivered by post, therefore I would like to still have the address fields on the signup page but make them optional.

I have set minimum values for:
Street Address
Post Code
City
State

to 0 and removed the * from the php file, but when I try to create account without address information it says:

your street address must contain a minimum of 0 characters
your post/zip code must contain a minimum of 0 characters
your city must contain a minimum of 0 characters

Can anyone tell me how I can solve this problem?

Thanks