Commonize ndslr4/r4sdhc kernel; make ndslr4 kernel old as it can us…

…e YSMenu

They're the same carts.

archive/ndslr4.com/Makefile

@@ -5,13 +5,13 @@ export BASE   := $(shell basename $(CURDIR))
 export OUT    := $(TOPDIR)/../../out
 export COMMON := $(TOPDIR)/../../common-kernels
 
-package: directory ndslr4.com_Kernel_1.34.zip extdata
+package: directory old extdata
 
 directory:
 	mkdir -p $(OUT)/$(BASE)
 
-ndslr4.com_Kernel_1.34.zip: directory
-	cd $(TOPDIR)/ndslr4.com_Kernel_1.34 && zip -r -X $(OUT)/$(BASE)/$@ *
+old: directory
+	make -C $@
 
 extdata: directory
-	cp README.txt $(OUT)/$(BASE)
+	cp readme.txt $(OUT)/$(BASE)

archive/ndslr4.com/README.txt

@@ -1,3 +1,12 @@
-This kernel is identical to the r4sdhc.com 1.34 kernel.
+# Installation instructions for YSMenu on ndslr4.com carts
 
-This cart is not compatible with YSMenu, and thus it is in its own folder. The contents are still identical.
+This flashcart only supports microSD cards up to 4GB in capacity.
+
+1. Download YSMenu from here: https://gbatemp.net/download/35737/
+2. Extract the YSMenu .7z file.
+3. Copy the files from the `R4SDHC YSMenu` folder to the root of your microSD card.
+4. Edit line 16 in the `TTMenu/YSMenu.ini` file to be `AUTO_BOOT=autoboot.nds` without the semi-colon.
+
+Cheats:
+    - YSMenu: TTMenu/usrcheat.dat
+    - Original R4SDHC kernel (old): _system_/usrcheat.dat