Updated Installation (markdown)

Installation.md

@@ -26,9 +26,21 @@ sudo apt-get install python3-pip
 ```
 
 ## Step 3:
-Make a fork of the main repository https://github.com/zeldaret/mm.git and clone your fork.
+Download build_tools.zip from the Releases section and extract it to the tools folder. This contains the compilers the decompilation uses, as well as a modified version of Qemu to emulate them on a modern Linux system. The compilers must go into the tools folder. Qemu may be placed wherever you like.
+
+## Step 4:
+Open up your .bashrc file (~/.bashrc), scroll to the bottom, and add the following, replacing `/path/to/qemu-mips` with the location the qemu-mips you extracted from the build tools:
+
+```
+export QEMU_IRIX="/path/to/qemu-mips"
+```
+
+Save and close/reopen your terminal window.
 
 ## Step 5:
+Make a fork of the main repository https://github.com/zeldaret/mm.git and clone your fork.
+
+## Step 6:
 
 Navigate to the folder you just cloned. Type the following commands:
 
@@ -37,7 +49,7 @@ git submodule update --init --recursive
 pip3 install -r requirements.txt
 ```
 
-## Step 5:
+## Step 7:
 
 You will need to acquire a copy of the ROM. The md5 of this ROM should be `2a0a8acb61538235bc1094d297fb6556`.
 
@@ -55,7 +67,7 @@ make disasm
 
 This will create the build folders as well as a newly created asm folder containing the disassemblies of nearly all the files containing code.
 
-## Step 6:
+## Step 8:
 
 Type the following:
 ```