Since these are commercial jobs, I really need to find a way to print them and I'm open to any suggestions.
Brad,
A few things to check.
1) Open Qimage and click HELP.
2) Hold the Shift key down while you click on Analyze Current Settings.
This will tell you how much resource is available for use by Qimage to handle an 875 megabyte file.
When you saved the PSD, did you remember to check the MAX compatibilty box?
When you created the TIF, were the settings in the SAVE box like the screen snap attached?
Byte Order and Pixel order in particular.
No Alpha Channels allowed in the image either.
Let's check and see what you can find.
Fred