diff --git a/Holding-Select-Allows-For-A-Second-Register-Item.md b/Holding-Select-Allows-For-A-Second-Register-Item.md
index 33c04c5..c6d3a02 100644
--- a/Holding-Select-Allows-For-A-Second-Register-Item.md
+++ b/Holding-Select-Allows-For-A-Second-Register-Item.md
@@ -5,7 +5,7 @@ By devolov
 ## Add this recolored SEL image into `graphics/bag/` as `select_button_hold.png`.  
 
 --------------------- graphics/bag/select_button_hold.png ---------------------  
-![select_button_hold](https://github.com/pret/pokeemerald/assets/36523934/2a23840f-d2f3-4842-9874-2c492039566a)
+![select_button_hold](https://github.com/pret/pokeemerald/assets/36523934/36cef18c-c344-4a28-9f5b-9fa749e2882d)
 
 
 ## Add the new item to register into the save data. Saving it in a way where it takes space from `unused_3598` allows save compatibility older sav files.  
@@ -429,4 +429,29 @@ index a64b8ffc4..953f78fc7 100644
  // overworld
  extern const u8 EventScript_WhiteOut[];
  extern const u8 EventScript_ResetMrBriney[];
-```
\ No newline at end of file
+```
+
+## Modify SwapRegisteredBike for the new register option.
+```diff
+--------------------------------- src/item.c ---------------------------------
+void SwapRegisteredBike(void)
+{
+    switch (gSaveBlock1Ptr->registeredItem)
+    {
+    case ITEM_MACH_BIKE:
+        gSaveBlock1Ptr->registeredItem = ITEM_ACRO_BIKE;
+        break;
+    case ITEM_ACRO_BIKE:
+        gSaveBlock1Ptr->registeredItem = ITEM_MACH_BIKE;
+        break;
+    }
++    switch (gSaveBlock1Ptr->registeredLongItem)
++    {
++    case ITEM_MACH_BIKE:
++        gSaveBlock1Ptr->registeredLongItem = ITEM_ACRO_BIKE;
++        break;
++    case ITEM_ACRO_BIKE:
++        gSaveBlock1Ptr->registeredLongItem = ITEM_MACH_BIKE;
++        break;
++    }
+}
\ No newline at end of file