Import From Excel To More Than One Table

Hi,

I have a excel file that contains some contact information and includes the following columns:
Date, Name, Address, Zip, City and phone

In the db I have 2 tables that I need to insert into, the statment of the first table is:

CREATE TABLE [TMsalg].[SQLUser].[tbl_Customer] (
[CustomerID] int NOT NULL,
[Name] varchar (50) NULL,
[Adress] varchar (100) NULL,
[ZipCode] varchar (50) NULL,
[City] varchar (50) NULL,
[Phone] varchar (50) NULL
)

and the other statment is:
CREATE TABLE [TMsalg].[dbo].[Order_Ernering] (
[OrderID] int NOT NULL,
[Customer_id] int NULL,
[Name] nvarchar (100) NULL,
[Adress] varchar (100) NULL,
[ZipCode] varchar (10) NULL,
[City] varchar (100) NULL,
[Phone] varchar (10) NULL,
)

Problems:
-How do i insert into tbl_Customer table the custom only once from excel?
-How do i insert into Contact_Company the correct customer_id and company_id?

Thanks for the help