windows print server not showing up

So, I am about 3/4 of the way towards fixing this. In 10.5 and 10.6 if I can't browse to the domain then the print server name to connect to the queue I can hold the "Ctrl" key and click on the top bar and select "Customize Layout" and I can then add the "Advanced" button to the toolbar and under there I can select "Windows" and for the URL I can enter in smb://printserver/queue_name

In 10.5 when I do this, the first time I go to print it asks for a username and password so I enter in my Domain\userid and password then save it to the keychain and all is good. In 10.6 it never prompts me for the Domain\userid so it automatically goes over as the "Guest" account. The problem is the printing software on the Windows side needs a username and password, if the job comes over as the Guest account it won't be released. I could use the URL of smb://username@domain.edu/printserver/queue_name and it will ask me for a username and password but our printing software needs the user name in the form of Domain\Username, not username@domain.edu. I also cannot put backslashes in the URL (like smb://Domain\username/printserver/queue).

Is there a way to get OS 10.6 to always request a username and not to go over as the guest account?

I called Apple Tech Support and couldn't figure this out. I was able to get this to work by specifying the URL as

smb://<domain username>:<domain_password>@domain.edu/<print_server>/<sharename>

but the problem is the plain text password then appears inside the /etc/cups/printers.conf file which is unacceptable.

One other thing I tried was removing the "Everyone" NTFS permissions on that queue on the server which removes the "Guest" user's ability to print. This stopped any jobs coming from the Mac and they sit in the queue with an error of

"On Hold (Authentication required)"

I would think at that point I could somehow have it ask me for a username and password that I could then save to the keychain but nope.... just sits there.

Here are the errors in the log file /var/log/cups

D [23/Sep/2010:14:23:22 -0400] [Job 38] bboxx = 0, bboxy = 0, bboxw = 612, bboxl = 792
D [23/Sep/2010:14:23:22 -0400] [Job 38] PageLeft = 12.0, PageRight = 600.0
D [23/Sep/2010:14:23:22 -0400] [Job 38] PageTop = 780.0, PageBottom = 12.0
D [23/Sep/2010:14:23:22 -0400] [Job 38] PageWidth = 612.0, PageLength = 792.0
D [23/Sep/2010:14:23:22 -0400] [Job 38] Backend returned status 2 (authentication required)
D [23/Sep/2010:14:23:22 -0400] [Job 38] Job held for authentication.
D [23/Sep/2010:14:23:22 -0400] [Job 38] End of messages
D [23/Sep/2010:14:23:22 -0400] [Job 38] printer-state=3(idle)
D [23/Sep/2010:14:23:22 -0400] [Job 38] printer-state-message="NT STATUS_ACCESSDENIED opening remote spool Google Maps"
D [23/Sep/2010:14:23:22 -0400] [Job 38] printer-state-reasons=none

There must be a way to have it prompt me or the username and password? I also tried creating all the same keychain entries it would have created had I had the capability of using the Windows browsing feature to set up a printer (which prompts for a password) but it never uses the keychain entries I created.