diff -x CVS -aur sourceinstall2-cvs/sourceinstall-gtk/dialog.c sourceinstall2-ntd/sourceinstall-gtk/dialog.c
--- sourceinstall2-cvs/sourceinstall-gtk/dialog.c	2008-06-23 20:52:07.000000000 +0200
+++ sourceinstall2-ntd/sourceinstall-gtk/dialog.c	2008-06-24 15:42:57.000000000 +0200
@@ -478,6 +478,18 @@
     return rv;
 }
 
+/* Autocheck feature:
+   activates the check button of an option if its value is not empty. */
+static void autocheck(GtkWidget *entry, GtkWidget *check_button)
+{
+    const gchar *text;
+
+    text = gtk_entry_get_text(entry);
+
+    if (text[0] != '\0')
+	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check_button), TRUE);
+}
+
 /* show configuration dialog, return choices in the passed string list.
    Return 0 if the user cancelled the operation.
    Writes the chosen configuration strings to S, and if non-zero
@@ -491,7 +503,7 @@
     GtkTooltips *tips;
     gint response;
     int i, j;
-    const char *title = _("Package Configuration");
+    char *title = _("Package Configuration");
 
     struct {
 	char *title;
@@ -562,6 +574,7 @@
 
 	for (j = 0; j < columns[i].set->count; j++) {
 	    GtkWidget *horizontal, *label;
+	    GtkWidget *entry, *check_button;
 	    char *text;
 	    char *key, *param, *comment;
 
@@ -569,20 +582,22 @@
 	    gtk_box_pack_start(GTK_BOX(vertical), horizontal, FALSE, FALSE,
 			       0);
 
-	    columns[i].check_buttons[j] = gtk_check_button_new();
-	    columns[i].entries[j] = gtk_entry_new();
-	    gtk_box_pack_end(GTK_BOX(horizontal), columns[i].entries[j],
-			     FALSE, FALSE, 0);
+	    check_button = gtk_check_button_new();
+	    entry = gtk_entry_new();
+
+	    gtk_box_pack_end(GTK_BOX(horizontal), entry, FALSE, FALSE, 0);
 
-	    gtk_entry_set_width_chars(GTK_ENTRY(columns[i].entries[j]),
+	    gtk_entry_set_width_chars(GTK_ENTRY(entry),
 				      i == 5 ? 20 : i == 2 ? 15 : 10);
+	    g_signal_connect_object (entry, "changed", G_CALLBACK (autocheck),
+				     check_button, 0);
 
 	    gtk_box_pack_start(GTK_BOX(horizontal),
-			       columns[i].check_buttons[j], FALSE, FALSE,
+			       check_button, FALSE, FALSE,
 			       0);
 
 	    label = gtk_label_new(columns[i].set->options[j].key);
-	    gtk_container_add(GTK_CONTAINER(columns[i].check_buttons[j]),
+	    gtk_container_add(GTK_CONTAINER(check_button),
 			      label);
 
 	    key = columns[i].set->options[j].key;
@@ -591,8 +606,7 @@
 
 	    if (i == 5 && j == 0 && state.o.prefix) {
 		/* pre set prefix option value */
-		gtk_entry_set_text(GTK_ENTRY(columns[i].entries[j]),
-				   state.o.prefix);
+		gtk_entry_set_text(GTK_ENTRY(entry), state.o.prefix);
 
 	    } else if (old_configured) { 
 		/* an option string (non-prefix) must always be preceded
@@ -607,15 +621,14 @@
 		    (start[len] == ' ' || start[len] == '=')) {
 
 		    gtk_toggle_button_set_active(
-			 GTK_TOGGLE_BUTTON(columns[i].check_buttons[j]), TRUE);
+			 GTK_TOGGLE_BUTTON(check_button), TRUE);
 
 		    if (start[len] == '=') {
 			char *end;
 			start = srcinst_strdup(start + len + 1);
 			if ((end = strchr(start, ' '))) {
 			    *end = 0;
-			    gtk_entry_set_text(GTK_ENTRY(columns[i].entries[j]),
-					       start);
+			    gtk_entry_set_text(GTK_ENTRY(entry), start);
 			}
 			free(start);
 		    }
@@ -627,10 +640,12 @@
 				param ? param : "", param ? "]\n" : "\n",
 				comment ? comment : "", NULL);
 
-	    gtk_tooltips_set_tip(GTK_TOOLTIPS(tips),
-				 columns[i].check_buttons[j], text, 0);
+	    gtk_tooltips_set_tip(GTK_TOOLTIPS(tips), check_button, text, 0);
 
 	    free(text);
+
+	    columns[i].check_buttons[j] = check_button;
+	    columns[i].entries[j] = entry;
 	}
     }