I suppose you're talking about his "Ks-Signale". Probably these links are useful:
BPanther's homepage:
http://trainz.mbremer.de (scroll down for English pdf files)
hjnk's homepage:
http://www.trainz-aktiv.de/html/ks-teststrecken.html and
http://www.trainz-aktiv.de/html/ks-tut_s.html (unfortunately in German only)
Ks-signals in general:
http://www.sh1.org/eisenbahn/shks.htm (in English) and
http://en.wikipedia.org/wiki/German_railway_signalling