Changing the order form

[serralta]

Hi there!

 

I have used Prestashop always like an user and just customizing small things. Now I need to customize the core and not just the theme or apparence.

 

I need to change the order form. Basically the step 3 will have three delivery options and, depending on the option choosen, the fourth step will ask for different information.

 

My question is... How would do try to do this job?

 

I am thinkg in two possibilities. Creating a module that will act as order form (even I don't know if it is possible) or override core classes to add this logic.

 

Which option do you think is the best one? If none, how would you do it?

 

Thanks!

Edited May 11, 2014 by serralta (see edit history)