Yes, I had that problem with the pspanel too, just put the mouse on the top edge (a double arrow mouse will appear) and stretch it upwards and it'll work. My panel stopped doing that, but I can't remember why... in fact I don't even recall taking any steps to fix it! Every time I load the plane it's fine now.
You might try the freeware forum at the pspanel site and see if they have an answer.
And do try saving in the 32-bit .bmp mode for the lights. Put the window lights (and tail light if wanted) on the alpha layer when you save.
