Shipment method with dropdown

[sandomatyas]

Hello,
I want to write an own virtuemart shipment plugin and I need some help.
The webshop has a contract with a company who has many offices around the country. I want to append a dropdown list to the shipment method and the customer can select a nearby office to pick up the order.
The list of the offices is on a fixed exter url, in XML format so the company can change it.
I have some PHP skills, getting and processing the XML is no problem, my questions are about the Virtuemart integration.

• How can I append a dropdown list to a payment method? Of course the field is requested but only if this is the active shipment method.
• How can I pass, store and display the selected office during the checkout process and the database
• How can I add this data to the confirm emails?
• Can I pre-select an item based on the selected zip-code of the customer's address?
• What if there are multiple shipment methods with this plugin. E.g. "office pick up 3 days", "office pick up 7 days"
• Can it works well even if I have one page checkout or not?

I appreciate all kind of hints or maybe a downloadable similar plugin.
Thanks

something like this:

[Milbo]

There are a lot Paymentplugins available. The shipment plugin works analog, so you can see there how todo all that.

[Djirko]

There are a lot Paymentplugins available. The shipment plugin works analog, so you can see there how todo all that.

Could you point me to one of them?

[alatak]

Hello
have a look at sofort ideal. They have a dropdown to select the bank.