trying to find some parts for my LS400, found this site that's apparently got them but it's giving me the option of loaded and unloaded calipers, anyone got any idea on what the difference is and which one I should order?

with or without pads maybe?

Yes, a loaded caliper is complete with brake pads and all hardware while the unloaded caliber is nothing but the caliper.

Curt

Thanks guys, all I needed to know!
as I only need one caliper and brake pads for both the fronts I'm gonne have to order an unloaded caliper and 2 sets of brake pads, plus a set of shimy's!