This text was copied from the SD remix website, but changed for use with 20XX 4.0 Beta.

Step 1: Download the tools for altering the ISO

The patch files we provide are meant to be used with xdelta. 

Download xdelta (with GUI) here 

Unzip the files somewhere you’ll remember. 

Step 2: Obtain a Super Smash Bros Melee 1.02 NTSC iso

 Step 3: Applying the Patch

Download this patch file for 20XX 4.0 Beta

Open the xdeltaUI.exe file you downloaded in step 1

It should look like this:

The “Patch” will be the patch file (20XX 4.0.xdelta) you downloaded.

The “Source File” will need to be your ISO of SSBM.

The “Output File” is the location and file name you want to save the generated 20XX 4.0 ISO as. Save it in a directory you’ll remember. I recommend calling the file “20XX beta.iso”. The file extension is important so it’s usable with other programs.

After you’ve set all three of these, click “Patch”. This might take a while, during which time the window may say that it is “Not Repsonding”. Don’t worry if this happens to you, it’s still working, ISOs are just really big (over 1 GB). On a good computer, it should take about 1 or 2 minutes.

When it is done, it will bring up a pop-up which will say “File patched successfully”.