Custom Orderby Options

Hi

I have configured 4 types of package on a ranked responsive theme:

1 – Free
2 – Front Page exposure
3 – Top of category results page
4 – Exposure Front page + + top of category results highlighted listing

With options 1 and 2 I have no problems.

But I want you in the search results to appear first ads option 4 and then option 3 …… sorted by date.

questions:

This is possible?

It is made by Custom Orderby Options? if yes An example of code

Any idea or example about this …?

Thanks