In LV 2009...
If you want to add customizations to the new VIs that are created by New>>VI For Override and New>>VI For Data Member Access, you can open and edit these three VIs. These VIs are called at the end of their respective scripting processes and you are free to include any scripting code you wish to further customize the VI in question. Some common customizations you might want include changing the VI name (use "get" and "set" instead of "read" and "write"), modifying the icon, adding additional diagram logic, etc. You cannot edit the callers of these three VIs, but these three provide the hook you need to customize your new VIs as you want them.
Customizations for Override VIs:
<labview>\resource\Framework\Providers\LVClassLibrary\NewAccessors\OverrideRetooler\Custom User Scripting For New Override VI.vi
Customizations for basic accessor VIs:
<labview>:\resource\Framework\Providers\LVClassLibrary\NewAccessors\BaseAccessorScripter\Custom User Scripting For New Simple Accessor VI.vi
Customizations for 1D Array element accessor VIs:
<labview>resource\Framework\Providers\LVClassLibrary\NewAccessors\ArrayElementScripter\Custom User Scripting For New Array Element Accessor VI.vi
Customizations for multi-dim array element accessor VIs:
<labview>\resource\Framework\Providers\LVClassLibrary\NewAccessors\MultiDimArrElemScripter\Custom User Scripting For New MultiDim Array Element Accessor VI.vi
This is for the various LAVA folks who asked these scripting hooks be added.