This happens at link time. The problem is that while DLLs and EXEs have resource sections where items such as .uir files can be stored, LIB files do not. So you cannot embed anything in a .lib file. Now, if the application that uses the .lib file is itself a CVI dll or executable, you can add the .uir to that project, along with the .lib file, and then select this option. Otherwise, you'll have to follow the suggestion that Juan Carlos gave.
Luis
NI