Can I skip 2,3 and 4 step i n the procces order?

[xabikip]

Hello,

 

I need in the buying process will not always be 2.Login, 3.Addres and 4.shipping steps.

I know it's a little weird, but it requires my store.

How do you think that this could be done?


2.Login
To skip the login ne idea is to have an user could have logged in and pull that whenever there. How'd you see? Any other ideas?

3.Address
Could create a virtual product but the downside is that virtual no possible combinations and this if they need it. Do I have to modify code? What?

4.Shipping
How could I skip this step?

 
Any idea how they could skip any of these steps will be welcome.

 
thanks;-)