diff -urN bk_client-1.1.org/sfioball.c bk_client-1.1/sfioball.c
--- bk_client-1.1.org/sfioball.c	2005-03-17 17:19:18.000000000 +0100
+++ bk_client-1.1/sfioball.c	2006-12-21 19:05:44.130432500 +0100
@@ -108,7 +108,7 @@
 usage()
 {
 	fprintf(stderr,
-	    "usage: sfioball [-r<rev>] bk://host[:port][/path_to_repo] dest\n");
+	    "usage: bk_sfioball [-r<rev>] bk://host[:port][/path_to_repo] dest\n");
 	exit(1);
 }
 
@@ -185,7 +185,7 @@
 		fprintf(stderr, "No keys?!?\n");
 		exit(1);
 	}
-	unless (f = popen("gunzip | sfio", "w")) exit(1);
+	unless (f = popen("gunzip | bk_sfio", "w")) exit(1);
 	while (sscanf(buf, "@BLOCK=%u@", &bytes) == 1) {
 		do {
 			switch (i = read(sock, buf, min(bytes, sizeof(buf)))) {
diff -urN bk_client-1.1.org/update.c bk_client-1.1/update.c
--- bk_client-1.1.org/update.c	2005-03-17 17:19:34.000000000 +0100
+++ bk_client-1.1/update.c	2006-12-21 19:06:03.711656250 +0100
@@ -104,7 +104,7 @@
 
 	if ((ac < 2) || scanurl(&u, av[1])) {
 		fprintf(stderr,
-		    "usage: update bk://host[:port][/path_to_repo] [dest]\n");
+		    "usage: bk_update bk://host[:port][/path_to_repo] [dest]\n");
 		exit(1);
 	}