diff --git a/twander.py b/twander.py
index f37c2cc..1116e54 100755
--- a/twander.py
+++ b/twander.py
@@ -6,7 +6,7 @@
 # Program Information
 
 PROGNAME = "twander"
-RCSID = "$Id: twander.py,v 2.85 2003/01/30 01:10:03 tundra Exp $"
+RCSID = "$Id: twander.py,v 2.86 2003/01/30 23:02:58 tundra Exp $"
 VERSION = RCSID.split()[2]
 
 # Copyright Information
@@ -129,11 +129,17 @@
 
 
 #####
-# GUI Default Size And Colors
+# GUI Defaults
 #####
 
-HEIGHT   = 25
-WIDTH    = 110
+#####
+# Initial Size And Postition In Pixels
+#####
+
+HEIGHT   = 600
+WIDTH    = 800
+STARTX   = 0
+STARTY   = 0
 
 #####
 # Default Colors
@@ -200,6 +206,7 @@
 
 
 AUTOREFRESH   = TRUE            # Automatically refresh the directory display
+CMDSHELL      = "[VSHELL]"      # Shell definition to use with manual command invocations
 DEBUGLEVEL    = 0               # No debug output
 MAXDIR        = 32              # Maximum number of directories to track
 MAXDIRBUF     = 250             # Maximum size of UI.AllDirs
@@ -571,8 +578,6 @@
           "          -r        turn off automatic content refreshing (default: refresh on)",
           "          -t        no quoting when substituting Built-In Variables (default: quoting on)",
           "          -v        print detailed version information",
-          "          -x width  window width (default: 110)",
-          "          -y height window height (default: 25)",
           ]
 
 
@@ -1006,8 +1011,8 @@
     UI.mBar.config(background=MBARCOL)
 
     UI.DirList.config(font=(FNAME, FSZ, FWT),
-                      foreground=FCOLOR, background=BCOLOR,
-                      height=HEIGHT, width=WIDTH)
+                      foreground=FCOLOR, background=BCOLOR)
+
 
     # Make sure menus conform to max lengths (which may have changed).
 
@@ -1057,6 +1062,9 @@
     UI.HelpBtn['menu'] = UI.HelpBtn.menu
     UI.HelpBtn.config(state=NORMAL)
 
+    # Size and position the display
+    UIroot.geometry("%sx%s+%s+%s" % (WIDTH,  HEIGHT, STARTX, STARTY))
+
 # End of 'SetupGUI()'
 
 
@@ -1941,7 +1949,12 @@
     # Execute command (if any) - Blank entry means do nothing/return
     if cmd:
 
-        ExecuteCommand(cmd, pMANUALCMD, ResolveVars=TRUE, SaveUnresolved=TRUE)
+        # On Unix systems, prepend the default shell string if it is enabled
+        mycmd = cmd
+        if OSNAME == 'posix' and CMDSHELL != '[]':
+            mycmd = "%s '%s'" % (CMDSHELL, cmd)
+        
+        ExecuteCommand(mycmd, pMANUALCMD, ResolveVars=TRUE, SaveUnresolved=TRUE)
 
         # Save the command only if Command History is enabled (MAXHIST > 0)
         # AND one of two conditions exist:
@@ -3122,12 +3135,13 @@
 
 UI.OptionsNumeric = {"DEBUGLEVEL":DEBUGLEVEL, "FSZ":FSZ, "MFSZ":MFSZ, "HFSZ":HFSZ, "HEIGHT":HEIGHT,
                      "MAXDIR":MAXDIR, "MAXDIRBUF":MAXDIRBUF, "MAXHIST":MAXHIST, "MAXHISTBUF":MAXHISTBUF,
-                     "MAXNESTING":MAXNESTING, "REFRESHINT":REFRESHINT, "WIDTH":WIDTH}
+                     "MAXNESTING":MAXNESTING, "REFRESHINT":REFRESHINT, "STARTX":STARTX, "STARTY":STARTY,
+                     "WIDTH":WIDTH}
 
 UI.OptionsString  = {"BCOLOR":BCOLOR,   "FCOLOR":FCOLOR,   "FNAME":FNAME,   "FWT":FWT,   # Main Font/Colors
                      "MBCOLOR":MBCOLOR, "MFCOLOR":MFCOLOR, "MFNAME":MFNAME, "MFWT":MFWT, # Menu Font/Colors
                      "HBCOLOR":HBCOLOR, "HFCOLOR":HFCOLOR, "HFNAME":HFNAME, "HFWT":HFWT, # Help Font/Colors
-                     "MBARCOL":MBARCOL, "QUOTECHAR":QUOTECHAR, "STARTDIR":STARTDIR}                   # Other
+                     "MBARCOL":MBARCOL, "QUOTECHAR":QUOTECHAR, "STARTDIR":STARTDIR, "CMDSHELL":CMDSHELL}    # Other
 
 # Prepare storage for key bindings
 UI.KeyBindings = {}
@@ -3180,7 +3194,7 @@
     OPTIONS = envopt.split() + OPTIONS
 
 try:
-    opts, args = getopt.getopt(OPTIONS, '-c:d:hqrtvx:y:')
+    opts, args = getopt.getopt(OPTIONS, '-c:d:hqrtv')
 except getopt.GetoptError:
     Usage()
     sys.exit(1)