Make A Database Of All The Xbox Live Arcade Arcade Games On The Xbox Live Marketplace?

I want to make a database of all the xbox live arcade arcade games on the xbox live marketplace, I need to parse an xml file and add the needed data from the xml node into a datagridview.Here is the xml file i need to use to grab links and other data about the game:

[URL]

Being the noob I am it took me about 6 hours to figure out how xml works and to write some code for what i need to do.

Here is what i came up with:

'for grabbing the name of the update
Public Sub updatename()
Dim xmldoc As New XmlDataDocument()

[code]....

That code works fine.Now when i add another column to the datagridview called "update size" i want to know how to add the grabbed data from another sub i made to the new column.What would the code be for adding the strings for the new sub into the seconds column? the first was, DataGridView1.Rows.Add(str)" . So what would the second be ?Also another question i have is how do i put an image in an imagecolumn by a web link, not a local picture.