Advice Needed on RAW Work Flow

[Ernie Stamper]

I have PS CS3, and I am aware of how to open a RAW image in CS3 to first apply the PS plugin to obtain both an Auto and Default starting position for the image, and to then further edit. The thing is, that I much prefer the default that Graphic Converter provides for most RAW images, if opened with GC. Is there a way to further tweak in RAW using the starting position of the GC default, much as would done in the PS plugin, or to transfer into PS CS3 with the default position that results in GC first opening the image? Can I add, and then invoke the PS Plugin for RAW used in CS3 to edit within GC? Is Levels doing anything differently with a .NEF vs a .jpg? If I save as RAW rather than .pic, will CS3 then open that in its plugin? Confused, but still happy with the ability to shoot in RAW with my Nikon D200. Ernie