Windows 7 - splwow64.exe crashes when printing to network printer

Found Solution:

It appears that MS did not include the full list of printer drivers on the install DVD. It also appears that when you tey to add a network printer, there is no simple way to find the missing drivers. Here's the solution (works every time on RC and RTM):

Even though your printer is not locally attached, first try to add it as a local printer. When you do this, and your printer is not in the selection list, use the option to search "windows update". Windows will go away for a while while it downloads a lot of missing drivers. You should now find your printer in the new improved list. Go ahead and install it.

If you need to, you can add as network now or leave local using the IP address.