Customize Wicket (The popup which opens when creating a document) , change labels

Is it possible to provide info while creating a specific document.
On click of creating document in cms, I get a popup with name and url fields, I need to give a hint or change the field name with more details on creating a specific document.

Customizing wicket is possible, but this is not a supported extension point. In practice any such project customizations tend to lead to an unwanted maintenance burden. Might I suggest:

Thanks @jasper.floor