Omustardo | How to Play Oldschool RS on the Client @Omustardo | Uploaded February 2013 | Updated October 2024, 11 hours ago.
In this video I show how to make the rs client work for the 2007 servers.
The instructions given by Jagex in the official rs wiki can be seen here: http://i.imgur.com/kZVt62p.png
but I'd recommend just following along in the video as I try to make it as clear as possible.

1. Go to the folder C:\Users\{user}\jagexcache\jagexlauncher\ or C:\Documents and Settings\{user}\jagexcache\jagexlauncher\
Where user is your username.

2. Copy the folder called runescape and rename it to oldschool

3. Open the oldschool folder and rename the .prm file to oldschool

4. Open the oldschool.prm file with a plaintext editor like notepad or textpad

5. Replace the line:
-Dcom.jagex.config=http://www.runescape.com/k=3/l=$(Language:0)/jav_config.ws
with:
-Dcom.jagex.config=http://oldschool.runescape.com/jav_config.ws
and then save and close the file
^Make sure you copy the entire thing, including bit that youtube cuts off.

6. Right click on the shortcut you use to open the regular runescape client and open its properties.
There should be an option to open file location so click that.

7. The file shown now is the actual executable program that is run to use the client.
Copy the file and rename the copy to something like JagexOldschoolLauncher.exe

8. Right click on it and make a shortcut to it(or pin it to the taskbar or start menu).

9. Right click on the shortcut you just made and open the properties.

10. In the area called "Target:" edit it so after it says the file name there's a space and then the word oldschool

11. Apply changes and close the properties windows.

12. Run the shortcut to play 2007scape on the client :)

Also unnecessary, but if you want the actual icon for the client from 2008 you can dl it here:
2shared.com/file/bY04u3V0/oldschool.html
To use it you just open the properties of your client shortcut and click change icon and then select browse, navigate to the .ico, and select it.