Here is a guide to get to my current setup, there is many ways to achieve something similar or better, the goal for this to help people that are not sure where to get started to get a base setup, take the things from this guide you can use, and add to it so it fits for you, this is how I do it, not the most optimal way <3

Tools we need:
Proxifier https://www.proxifier.com/
Sandboxie https://sandboxie-plus.com/downloads/

Download and install both.


Decide on a naming system that works for you, I will be using os1 os2 os3 ...
This should be something simple.

Jagex Launcher, we do need to make a copy for each client we want to run, for now make 2 copies of

First we will setup our proxies so we don't have to worry about them later.


Match the naming you choose, I use numbers same as os1 os2 os3 ..

Proxifier:

We will add 2 proxies and 2 rules as a start, and copy them to make the rest, this is why your naming need to be simple.

Lets add our proxy servers to Proxifier


A windows will open:

Here we press Add and add 2 proxies (Ignore mine, when you are done, you should see 2 on the list), we will automate the process <3
This part I can't help with, check where you got your proxies from and figure out how you should connect to them.

you can add a label in the Advanced settings in the window above (not needed, but recommended, to easy see what proxy is for what client)

We will now add 2 matching rules.

Here we will add rules for the 2 proxies.

Make a rule for your sandbox (we will set that up next)
The folder you want to use is the one with DefaultBox in it:

Here we use the same naming as you choose at the start.
mine are os1 os2 os3.
You don't need to have the sandboxes created yet.

Now with 2 proxies added, and 2 rules for each proxies added, we will export our settings, add how many we want, then import again.

Export:

Place it somewhere, so you know where it is.

You should now have a .ppx file, we can open this with our favorit notepad wannabe (or just Notepad)

Here you can see the proxies we added, you should see 2

And the rules:

We now need to add the rest of the proxies and rules, I will do this with AI, you can copy/pate, or make a simple tool that do it, if you don't want to use AI.
Any AI should do fine, for this demo I will use Deepseek https://chat.deepseek.com/ as it's free but slow (This is slow, I do recommend a better model if adding many at a time), but any AI should do this fine.

I used this command to add 50 proxies and rules
"Keep the same structure, but add another 50 proxies and matching rules to this:

{Content of the .ppx file}
"

It should then reply with a filled out list, we can now replace this with what was in our .ppx file

We can now go back into proxifier and import the new .ppx file

Sandboxie:

This is a more simple setup, reason we do this is to easily be able to have proxifier work we different clients, and I like to have my clients separated like this.

Lets start with making our base sandbox (a clean client), This can be skipped and you can make your client sandbox directly.

For this base setup we will install OSRS to our new sandbox, so we have a clean install we can copy.

Install osrs, make it as ready as you want for a new client.

We can now make a copy of this folder:

Create a sandbox with the same name, as this is matching our proxifier rules.

We now need to open the matching JagexLauncherXX.exe In the sandbox we made for it, starting osrs with that client and you should see the connections in proxifier

So after this long setup.
When you want a new client:
1) copy your default sandbox, to the next in your naming system.
2) create a sandbox in sandboxie with matching name.
3)make a copy of JagexLauncher, matching your naming system, start it in the newly created sandbox.

I'm currently making a tool to automate all this, and more, if you are interested in a tool like that, got idea or help testing it join my Discord <3

Nice!! Thank you for this!!!