"sampler.kye" is a renamed copy of a file obtained from "sampler.zip".
The ZIP file in question (sampler.zip) was obtained from:

      http://www.nuke.demon.co.uk/Kye/levels/sampler.zip

"spcinvaders.xye" and "tombs.xye" are renamed copies of files obtained
from "commoner.zip".  The ZIP file in question (commoner.zip) was  ob-
tained from:

      http://groups.google.com/group/groupxye/web/\
CommonerX_Levels_1.zip?hl=en