Thanks Bigpaws. That works up to this point.
alien -t z600cups-1.0-1.i386.rpm
alien: command not found
I tried just installing from the rpm, but- test gives
</Desktop/lexmark/z600cups-1.0-1.i386.rpm';echo RESULT=$?
error: Failed dependencies:
z600llpddk >= 2.0-1 is needed by z600cups-1.0-1
cups >= 1:1.1.15-10 is needed by z600cups-1.0-1
/bin/sh is needed by z600cups-1.0-1
RESULT=1
Help!!

do I need to install the z600llpddk-2.0-1.i386.rpm first? If so, doing an rpm install (test)
</Desktop/lexmark/z600llpddk-2.0-1.i386.rpm';echo RESULT=$?
error: Failed dependencies:
/bin/sh is needed by z600llpddk-2.0-1
libc.so.6 is needed by z600llpddk-2.0-1
libc.so.6(GLIBC_2.0) is needed by z600llpddk-2.0-1
libc.so.6(GLIBC_2.1.3) is needed by z600llpddk-2.0-1
RESULT=1
now I'm lost!