can't install laser driver supplied as rpm

[Steve Kleene <skdeb@syrano.acb.uc.edu>]

I'm running Lenny and trying to install the manufacturer's Linux driver for a
Xerox Phaser 6280DN color laser printer.  The driver is supplied as a tar,
which unpacks to a single rpm file:

  Xerox-Phaser-6280-1.0-1.noarch.rpm

I ran

  alien --to-deb --scripts Xerox-Phaser-6280-1.0-1.noarch.rpm

which completed without error, making

  xerox-phaser-6280_1.0-2_all.deb

However, when I try to install this

  apt-get -V install xerox-phaser-6280_1.0-2_all.deb

it fails as follows

  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  E: Couldn't find package xerox-phaser-6280_1.0-2_all.deb

The package is right in the working directory, and I copied and pasted the
file name to make sure there were no typos.

It appears that installing the rpm may fail too.  I tried

  rpm --test -ivh Xerox-Phaser-6280-1.0-1.noarch.rpm

and got

  error: Failed dependencies:
  /bin/sh is needed by Xerox-Phaser-6280-1.0-1.noarch

I of course do have /bin/sh, which is linked to bash.

I am able to list the contents of the rpm

  rpm -qlp Xerox-Phaser-6280-1.0-1.noarch.rpm ->
    /usr/share/cups/model/Xerox/Xerox_Phaser_6280DN.ppd.gz
    /usr/share/cups/model/Xerox/Xerox_Phaser_6280DT.ppd.gz
    /usr/share/cups/model/Xerox/Xerox_Phaser_6280N.ppd.gz

I'd appreciate any suggestions on how to install this driver.  Thanks.