I think this one can be achieved by doing the following;
System > Shipping Methods
click on 'HikaShop Manual Shipping Plugin'
Do this [add] a new Shipping Method for each different weight class..
for example;
Methods:
less then 5kg, $10.00
greater then 5kg and less then 10kg, $20.00
name the first method 'less then 5kg'
and set the 'maximum weight' field to 5kg
set the price to $10.00
name the second method '5kg upto 10kg'
and set the 'minimum weight' field to maybe 5.01kg
and the 'maximum weight' to 10kg
set the price to $20.00
now in theory.. if you have a product which weighs 1kg..
and order up 5 of these items the correct shipping amount should be.. $10.00
however if you order between 6-10 of these products then the shipping should equate to $20.00
other useful things to consider is 'zones' & postcodes..
if you are in an area where it is divided into say two zones for example.
you can setup one country zone.
and split that into multiple zones using postcodes. for example;
north zone could use postcodes from 0-5000
south zone could use postcodes from 5001-10000
now for the scenario above you could set variables like this;
method 1: north zone less then 5kg
postcodes:0-5000
max-weight:5kg
price:$10.00
method 2: north zone 5kg to 10kg
postcodes:0-5000
min-weight:5.01kg
max-weight:10kg
price:$20.00
method 3: south zone less then 5kg
postcodes:5001-10000
max-weight:5kg
price:$15.00
method 4: south zone 5kg to 10kg
postcodes:5001-10000
min-weight:5.01kg
max-weight:10kg
price:$25.00
.
in your shipping methods you can have different fee's for these zones.
hope this helps.
also you can upload your shipping companies logo to the root/media/com_hikashop/images/shipping folder and set it as the logo for the shipping
provider.