As you probably know, I'm a big science-fiction fan, and quite a few years ago now, I found this great looking papercraft Aliens Caterpillar P-5000 Powerloader, made by Piotr Kopr (a.k.a. Klaymen)!
But some time later, when I was making the links section on my papercraft weblog here, I discovered that the original link on the Konradus forums had gone dead... :o(
I was able to contact Klaymen though, and he allowed me to share his model on my own papercraft weblog so people could still enjoy it:link ;o)
Have fun building!