diff --git a/gp2x/Makefile b/gp2x/Makefile
index 4c55445..59a7c15 100644
--- a/gp2x/Makefile
+++ b/gp2x/Makefile
@@ -237,6 +237,10 @@ endif
 rel: PicoDrive.gpe code940/pico940_v2.bin readme.txt PicoDrive.man.txt PicoDrive.png ../game_def.cfg
 	zip -9 -j ../../PicoDrive_$(VER).zip $^ mmuhack.o
 	zip -9 -r ../../PicoDrive_$(VER).zip skin -i \*.png -i \*.txt
+	mkdir bin_to_cso_mp3
+	cp ../../tools/bin_to_cso_mp3/* bin_to_cso_mp3/
+	zip -9 -r ../../PicoDrive_$(VER).zip bin_to_cso_mp3
+	rm -rf bin_to_cso_mp3
 
 code940/code940.bin:
 	make -C code940/
diff --git a/psp/Makefile b/psp/Makefile
index a2f37f0..c89f1d6 100644
--- a/psp/Makefile
+++ b/psp/Makefile
@@ -179,6 +179,10 @@ rel: EBOOT.PBP readme.txt ../game_def.cfg
 	cp skin/* PicoDrive/skin/
 	zip -9 -r ../../PicoDrive_psp_$(VER).zip PicoDrive
 	rm -rf PicoDrive
+	mkdir bin_to_cso_mp3
+	cp ../../tools/bin_to_cso_mp3/* bin_to_cso_mp3/
+	zip -9 -r ../../PicoDrive_psp_$(VER).zip bin_to_cso_mp3
+	rm -rf bin_to_cso_mp3
 
 rel_kxploit: readme.txt ../game_def.cfg
 	mkdir -p PicoDrive/skin/
@@ -186,4 +190,8 @@ rel_kxploit: readme.txt ../game_def.cfg
 	cp skin/* PicoDrive/skin/
 	zip -9 -r ../../PicoDrive_psp_$(VER)_kxploit.zip PicoDrive
 	zip -9 -r ../../PicoDrive_psp_$(VER)_kxploit.zip PicoDrive%
+	mkdir bin_to_cso_mp3
+	cp ../../tools/bin_to_cso_mp3/* bin_to_cso_mp3/
+	zip -9 -r ../../PicoDrive_psp_$(VER)_kxploit.zip bin_to_cso_mp3
+	rm -rf bin_to_cso_mp3