Sometimes it is even necessary to set the joint type of the imported rig differently from the joint type of the final Avastar character. SL supports 2 Joint Types (POS and PIVOT) and unfortunately both types are used by different Developer kits.

However there are a few points that may cause problems: But you will quickly find out that most fields are self explaining. The customization looks a bit complicated first. In the screen shot we have already added a new development kit configuration and added it to the Configuration list by hitting the button Add/Replace Developer kit Preset (see image): Of course all fields are empty at the beginning. Here is a screen shot of the Developer kit Configuration panel in the Avastar Addon Preferences.