Windows XP and Server 2003 Utility Manager has a dedicated library for the resources and other stuff. Utility Manager is just a simple process that loads it. Hence create a library for the program, UManDlg.dll, and move the resources and other stuff there.
In addition to that, use ExtractIconW to get the icon resource from the program (the DLL doesn't share icons by default) and remove the icon resource from the "About" dialog window. Also change the encoding type of other translation files to UTF-8 (which were previously set with UTF-8 with BOM).