I have installed IPRINT and it works correctly except that when users
click on the printer map the printer installs properly, but it isn't in
their list of printers. IF they reselect the printer from the map, it
goes to the control window for the printer.

Of course, this makes it unavailable to applications, so it is the same as
it not installing properly. We use DLU and give everyone local
Administrator rights to their local windows. When I login, I have no
issues with installing the printers, and it stays installed under my
login. The users are members of the group that has both USER and OPERATOR
rights to the printer.