argh, hold your horses etc.
First a quick point - even if the GF2 did have aux buffers we don't ask for any when we init the LWJGL window (not really a game requirement). If you want to fiddle around with such things perhaps you want to check out the dll source code and tweak display init for now.
As for p-buffers - whoops, you've found a bug I think, because it seems like we've forgotten to initialise handle with a value... (otherwise I don't know anything about p-buffers much but in all honesty I'd avoid them like the plague
and use ARB_render_texture instead which is far easier to use and understand.