Provide an interface to edit only one field of a content type? I am trying to create a 'start a bounty' system, just the same as on this site using userpoints. There should be a link 'Start a bounty' which allows the question creator to start a bounty using his points. I am using userpoints for this purpose and I created a field where the user can select the number of points he would liek to give out for a correct answer. But this can only be done on node creation or while editing the entire node. The question is - how to be able to select the number of points only after clicking on 'start a bounty' without the need of editing all the remaining fields. So ideally there should be a popup with dropdown field that edits only this particular field. I guess one approach is to create a node edit form with this field only (is this possible at all?) and put it in the ajax popup... Any ideas / advice?
There is a new module by Earl Miles, the creator of Views, that does this in Drupal 7 called the Field API Pane Editor.  Unfortunately, because this is a new solution for D7 and Earl Miles tends not to reinvent the wheel, I don't think there is any existing module that you can download for this use case in D6.