Big Grid – Manually Order

Hi, my name is Pedro and I developing a new website http://basquete360.com.br/novosite/

I´d like to order manually the posts of the Big Grid. I want to have full control of what post is more important without having to edit the posting time.

It´s a Basketball News Portal and some posts have greater impact than others, so I need to set the order manually.

How can I do it?

Thanks,

I just found the answer using a tutorial from you, anyway, thanks for the attention.