Update INSTALL.md

Some updates to the install docs while assisting some new contributors with installation.

INSTALL.md

@@ -228,7 +228,7 @@ the repository](#2-downloading-the-repository).
     sudo mkdir -pm755 /etc/apt/keyrings
     sudo wget -O /etc/apt/keyrings/winehq-archive.key https://dl.winehq.org/wine-builds/winehq.key
     sudo apt update
-    sudo apt install --install-recommends winehq-stable
+    sudo apt install --install-recommends wine-stable
     ```
 
 2. Install the following packages via `apt`:
@@ -319,10 +319,11 @@ in the lower right corner.
 
 ### Unix Systems
 
-Export the environment variable as above to your terminal profile:
+Export the environment variable as above to your terminal profile. To do so, run the
+following commands from the root of your repository:
 
 ```bash
-echo 'export LM_LICENSE_FILE="/path/to/pokeplatinum/tools/cw/license.dat"' >> ~/.bashrc
+echo "export LM_LICENSE_FILE=\"$(pwd)/tools/cw/license.dat\"" >> ~/.bashrc
 source ~/.bashrc
 ```