Just a note. I think GFX2 saves only as IFF. IFF and LBM are the same thing. The IFF extension is used to indicate many different types of data (sound, etc...) and an LBM is an InterLeaved BitMap, which is the raster format stored in IFF.
In other words, when it saves out the IFF, just rename the extension to LBM.

I've downloaded the Adobe Photoshop plugin SDK and will be looking at it soon to attempt to make a plugin. My C++ skills are not great, but I might be able to handle it. Paintshop Pro works with photoshop plugins, so I can kill two birds here!

Scott