Shipping fee to different coutries have different percentage and minimum fee

[vidadio]

Hi there, in which module and how can I set up
charge 5% of Net order total for shipping to UK (Minimum shipping £3, Maximum £10), charge 5% of Net order total+50% of shipping for EU ship to address (Minimum £4.50, Maximum £15)
users need to phone and enter a price in the checkout page for shipping to international countries.

I tried and am still working on flex module. May anyone give me some ideas?

thank you 

[vidadio]

extra information :
I have set up zone_id for each country in the jos_vm_country table.
zone_id = 1 => International
zone_id = 2 => UK
zone_id = 3 => EU

I made another 2 copies of flex.php, flex.ini and flex.cfg.php files for EU and International.

What can I do to match my require?