jQuery Grid Plugin - jqGrid

Hi, I've been searching around the web, the Doc and these forums in search for answers but none really came up.

I have a multilevel tree, loading a great amount of data in JSON. In some cases I need to load about 2000 rows.

Obviously performance is pretty slow when trying to render all this. We're looking at options to reduce the amount of data loaded at the same time. I've seen mention of "Autoloading" but have not seen any clear documentation about what it really is, and how to use it.

Loading the JSON is not really the issue here, it happens fast enough. What is slow is the time it takes to build the whole html structure.

What I'd like to achieve is to have the Root nodes displayed, and expanding them would load/insert the children rows dynamically, this way reducing the amount of stress on the UI.

I *think* the autoload feature does just that, but it's quite obscure right now. 

Any inputs would be greatly appreciated. Ideally I'd need a fast response, time is short for this project. 

Thank You

O.