move rows based on cell content and add header

Hello,

I have a worksheet that I have to sort and add headers to everytime it gets sent out, it shows the differences in weights and if the are over an agreed amount the number of entries can vary bu will never be more than 50, so, if the weight in column F is below 4.2 then it needs to keep them together move them to the top of the page and put a header on top, the same with column G these go underneath the above and finally all the rest go at the bottom also with a header. I have attached a sample workbook with the before and after.

Thanks reg