HP 7600 AIO Leopard update

Question

I recently found the new release of HP 7600 software for Leopard. After some trouble, I was able to install it (apparently) successfully for our HP Officejet Pro L7650 (which apparently is the Costco version of the L7680).
I have a LAN based on an Airport Extreme and an ethernet switch, and the first problem for me was simply understanding how to hook up the cables. Simply running a USB from the Airport got me printing but nothing else (as your literature states). To get full functionality, however, I connected the L7650 to the ethernet switch.
In running the install program on each of our three computers, the program came to a point during setup where it said it could not find the AIO and concluded that the install program could not continue. I found, quite accidentally, that disconnecting and then reconnecting the ethernet cable from the switch to the AIO enabled the program to proceed. With that quirk, the software was installed on two computers; the third required removal of all the HP software I could find before it, too, accepted the new install.
After I got it installed and working, I received the following from HP "Customer Care" in response to an annoyed letter from me. I offer it without comment; I have not tried it:
*****beginning of HP communication quote******
Donald, here is the link from the HP.com website to download the required software for this printer to work with the Leopard operating system.
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-56883-1 &lc=en&cc=us&dlc=en&product=3203059&os=219&lang=en
Please follow these next steps provided in order to manually uninstall all software pertaining to this printer from your computer.
Double-click Macintosh HD .
Open the Applications folder.
Open the Utilities folder.
Double-click Activity Monitor . The Activity Monitor window should open. If the window does not open, select Window , then Activity Monitor .
When Activity Monitor opens, look for the following processes:
NOTE: Not all of these processes may be running.
HP Communications
HP Director
HP Image Zone
HP Trap Monitor
pipedaemon
HPIO Classic Proxy
HPIO Classic Proxy 2
Hpdot3d
HP AiO Notifications.app
Print daemon
Highlight them one at a time and click the Quit Process icon.
Click Force Quit to quit the process.
Close Activity Monitor after quitting all the found items.
Remove the following files and folders from the partition where the All-in-One software is installed:
NOTE: Some of the files described in the following steps may not be found.
Macintosh HD/Applications/HP AiO Software/Hewlett-Packard folder
Macintosh HD/Library/Application Support/hp folder
In Macintosh HD/Library/Caches , drag the following files to the trash:
Any files beginning with HP or hp
Any files beginning with Hewlett-Packard
Any files beginning with com.hp
Macintosh HD/Library/Documentation/Help/HP Photo and Imaging Help
Macintosh HD/Library/Frameworks/HPServicesInterface.framework
Macintosh HD/Library/Image Capture/TWAIN Data Sources/HP All-in-One Scan.ds
In Macintosh HD/Library/Image Capture/Scripts , drag the following files to the trash:
Import and View with iPhoto
View with HP
In Macintosh HD/Library/Preferences , drag the following files to the trash:
Hewlett-Packard Preferences
HP Registry
Any files that begin with com.hp
Move Macintosh HD/Library/Preferences/loginwindow.plist to the desktop.
NOTE: Not removing the file loginwindow.plist during the manual uninstall could cause the uninstall to be unsuccessful.
In Macintosh HD/Library/Printer/hp , drag the following files and folders to the trash:
aio
Frameworks folder
hpio folder
pipedaemon
Print Daemon
Utilities folder
In Macintosh HD/Library/StartupItems , drag the following folders to the trash:
HP IO
HP Trap Monitor
NOTE: On some systems it is necessary to enter the user password to delete those both folders from the StartupItems folder. Do the identification with entering the OS X admin password.
In Macintosh HD/Users/USERNAME (this should have a symbol of a house next to it)/Library/Preferences , drag the following folders to the trash:
Any files beginning with com.apple.print
Any files beginning with com.hp
Any files beginning with Hewlett-Packard
Any files beginning with HP or hp
In MacintoshHD/Users/USERNAME/Library/Printers , drag any All-in-One printers listed here into the trash.
Drag the HP Director or HP Image Zone icon from the Dock and drop it on an empty space on the desktop. The icon will disappear.
Close all open windows.
Restart.
Empty the Trash.
Quit any HP processes that may prevent items from being deleted from the trash.
After logging in, verify and possibly repair any permissions that might have been affected using these steps:
Open Macintosh HD/Applications/Utilities/Disk Utility and double-click on Disk Utility .
Upon the left side, select the Macintosh HD . It will be indented and usually is the second entry in that list.
On the right side beneath the white box select Repair Disk Permissions . This process may take several minutes.
Close Disk Utility by single-clicking the red dot at the top left of the dialog box.
Install the printer software. If there is other HP hardware that needs to be re-installed, install it afterwards.
Double-click the downloaded file containing the software for the printer.
Double-click the Installation file; it will be either All-in-One Installer or Vise Installer .
Proceed through the questions asked. If prompted for an account and password, use the information for the user account you are currently logged into.
NOTE: After installation is finished the HP Setup Assistant must be completed.
In some situations the All-in-One Setup Assistant will ask you to open the Printer Setup Utility in order to add the printer manually. If prompted with this, use the following steps:
If the All-in-One is directly connected to the Mac with a USB cable:
Click Printer Setup Utility .
When the Printer Setup Utility opens, click Add .
Single-click the entry for the HP All-in-One which is connected by USB.
Click Add .
*****end of HP communication quote******

Answer 1

Nobody has any ideas?