Customization of Dojo(Dijit) tree - repost

We have a requirement where we need to customize a Dojo tree. Our requirements: 1) We have a huge JSON array as input to the tree. Children are specified as nodes of tree. There can be upto 100 children/nodes in tree. 2) Load new tree on dropdown event. 3) Add node /Delete node/Update information of selected node. 4) Different icons for different type of nodes based on node type. 5) Right Click menu actions for each node. Experience of websockets and HTML5 preferred. Experience on DOJO tree added advantage.