The shipping plugin doesn't fit me, because I would need product or category based shipping calculation, so I am wondering where can I write some code to override the shipping cost and just use my own calculation (just set if one of products use category X shipping price is X, if he uses category Y, shipping price is Y...)?
I was thinking on modifying plugin to take product weight and use that as shipping cost and than just sum together all product weight numbers and use that as shipping cost - maybe any idea how to modify shipping plugin to enable that?
It is a "standard" plugin, copy the filesan rename file and classes. You can find more about writing a plugin here;
https://docs.virtuemart.net/tutorials/development/84-extension-plugins.html (https://docs.virtuemart.net/tutorials/development/84-extension-plugins.html)
regards
Jörgen @ Kreativ Fotografi