Hello Heiko,
pisi -h dosn`t help and it is not a problem from Claus2008

I tried it with the command
cd like this example:
Andreas@PC-Andreas ~ $ su
Passwort:
PC-Andreas ~ # cd /home/Andreas/Downloads
PC-Andreas Downloads # pisi it compiz-fusion-0.7.4-15-16.pisi
Installation's Ordner:compiz-fusion
Installiere compiz-fusion, Version 0.7.4, Release 15, Build 16
Konfiguriere Paket compiz-fusion zum entfernen
Entpacke die Dateien aus compiz-fusion
Konfiguriere Paket compiz-fusion
compiz-fusion konfiguriert
compiz-fusion installiert
Problem solved.

Greetings
Andreas