How to list foreign keys in all databases

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SQL-Server

SQL-Server-2008

I know how to list foreign keys in a given database

USE mydatabase;
go
SELECT 
    f.name AS ForeignKey, 
    OBJECT_NAME(f.parent_object_id) AS TableName, 
    COL_NAME(fc.parent_object_id,fc.parent_column_id) AS ColumnName, 
    OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName, 
    COL_NAME(fc.referenced_object_id,fc.referenced_column_id) AS ReferenceColumnName 
FROM sys.foreign_keys AS f 
INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id 
INNER JOIN sys.objects AS o ON o.OBJECT_ID = fc.referenced_object_id;
go

However I want to be able to get the same information from different databases though a t-sql code. I do not want to use "USE database" but I see no other way.

When I add the database name to the above code and run it from database mydatabase,

SELECT 
    f.name AS ForeignKey, 
    OBJECT_NAME(f.parent_object_id, DB_ID('AdventureWorks2008')) AS TableName, 
    COL_NAME(fc.parent_object_id,fc.parent_column_id) AS ColumnName, 
    OBJECT_NAME (f.referenced_object_id, DB_ID('AdventureWorks2008')) AS ReferenceTableName, 
    COL_NAME(fc.referenced_object_id,fc.referenced_column_id) AS ReferenceColumnName 
FROM AdventureWorks2008.sys.foreign_keys AS f 
INNER JOIN AdventureWorks2008.sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id 
INNER JOIN AdventureWorks2008.sys.objects AS o ON o.OBJECT_ID = fc.referenced_object_id

I do not get the column names.

Does anyone have a pointer for getting these?

Thank you,