[Solved] The new column command and PartialView question

[Max]

Hell all,

I am following the help file instructions below:
http://www.telerik.com/help/aspnet-mvc/telerik-ui-components-grid-custom-commands.html

where is says "The action method requested by a custom ajax command must return JSON result."

Well, I am returning a Partial view contaning rendered html for another Grid.
How can I include the returned data into the content of a window?

If Custom Command is not the best option, could someone provide me a sample using other methods?

Thank you

Max