Not being one to resist a mystery I cracked open one of these files in UltraEdit to see if I could figger out what they were & all the files open with the line "Form 2LWOBSRFS Default PFNS..." so I renamed them all to xxxx.lwo & sure enough they do open in LW 5.5 (& 3D exploration :-). I guess all you have to do is assemble the pieces in Lightwave to get your crossbow :-)