OK, I with some more research I answered my own question. I basically
had to do two things:
(1) Add the -f option to the FreeWrap command line with a text file
containing the path to all the BWidget files. I guess this is
necessary so that FreeWrap can "wrap" the Bwidget files into the
executable.
(2) Add an newline to the "en.rc" file found in the BWidget directory
(/Tcl/lib/bwidget1.7/lang/en.rc). Just open the "en.rc" file in a text
editor and add an empty newline to the end of the file. This
eliminates the "missing newline on line 52" FreeWrap error.
So my FreeWrap command line looks like this:
freewrapPLUS bwidget.tcl -f bwidget.txt
where the file "bwidget.txt" contains the following:
c:\Tcl\lib\bwidget1.7\arrow.tcl
c:\Tcl\lib\bwidget1.7\bitmap.tcl
c:\Tcl\lib\bwidget1.7\button.tcl
c:\Tcl\lib\bwidget1.7\buttonbox.tcl
c:\Tcl\lib\bwidget1.7\bwidget.tap
c:\Tcl\lib\bwidget1.7\color.tcl
c:\Tcl\lib\bwidget1.7\combobox.tcl
c:\Tcl\lib\bwidget1.7\dialog.tcl
c:\Tcl\lib\bwidget1.7\dragsite.tcl
c:\Tcl\lib\bwidget1.7\dropsite.tcl
c:\Tcl\lib\bwidget1.7\dynhelp.tcl
c:\Tcl\lib\bwidget1.7\entry.tcl
c:\Tcl\lib\bwidget1.7\font.tcl
c:\Tcl\lib\bwidget1.7\init.tcl
c:\Tcl\lib\bwidget1.7\label.tcl
c:\Tcl\lib\bwidget1.7\labelentry.tcl
c:\Tcl\lib\bwidget1.7\labelframe.tcl
c:\Tcl\lib\bwidget1.7\listbox.tcl
c:\Tcl\lib\bwidget1.7\mainframe.tcl
c:\Tcl\lib\bwidget1.7\messagedlg.tcl
c:\Tcl\lib\bwidget1.7\notebook.tcl
c:\Tcl\lib\bwidget1.7\pagesmgr.tcl
c:\Tcl\lib\bwidget1.7\panedw.tcl
c:\Tcl\lib\bwidget1.7\panelframe.tcl
c:\Tcl\lib\bwidget1.7\passwddlg.tcl
c:\Tcl\lib\bwidget1.7\pkgIndex.tcl
c:\Tcl\lib\bwidget1.7\progressbar.tcl
c:\Tcl\lib\bwidget1.7\progressdlg.tcl
c:\Tcl\lib\bwidget1.7\scrollframe.tcl
c:\Tcl\lib\bwidget1.7\scrollview.tcl
c:\Tcl\lib\bwidget1.7\scrollw.tcl
c:\Tcl\lib\bwidget1.7\separator.tcl
c:\Tcl\lib\bwidget1.7\spinbox.tcl
c:\Tcl\lib\bwidget1.7\statusbar.tcl
c:\Tcl\lib\bwidget1.7\titleframe.tcl
c:\Tcl\lib\bwidget1.7\tree.tcl
c:\Tcl\lib\bwidget1.7\utils.tcl
c:\Tcl\lib\bwidget1.7\widget.tcl
c:\Tcl\lib\bwidget1.7\xpm2image.tcl
c:\Tcl\lib\bwidget1.7\lang\da.rc
c:\Tcl\lib\bwidget1.7\lang\de.rc
c:\Tcl\lib\bwidget1.7\lang\en.rc
c:\Tcl\lib\bwidget1.7\lang\es.rc
c:\Tcl\lib\bwidget1.7\lang\fr.rc