You can do it all on one form. It is not however a secure form; where people can pay, so I don't want you to think it is.
When you create a form, you get some fields "auto added" Untick the Use/Reg options upper left of the toolbar for the ones you don't want.
Add a radio block to your form, hover over the block and you should see a +- sign appear. Click on the + enough to add your options.
Next to each radio button, it says "New Radio Option" Click in that text, and type in what you want to appear as the options. The default text will disappear.
Edit the headline at the top of the form and to the left of the radio buttons too.
Edit your submit/order/preorder (yes you can change that text too) button.
Update the Form Info.
Don't forget to save (Build It).
Here is the link to the Help File for FBI also: http://help.sitesell.com/fbi/build/formbuilder.html
If you can't get it to build for some reason, do reach out to Support:http://support.sitesell.com/contact-support.html