Hi guys! Here is a guide on how to launch two planetside applications at the same with without any external program such as sandboxie. This guide was quite late because i forgot but hopefully this will help you guys!
1. Copy your Planetside 2 folder to any other directory on the computer( I've got my second on the desktop) If you installed through the steam then just go into steamapps,common and copy the folder from there.
2. When you have copied the folder then open the folder and right click on the file ''Launchpad''.
https://i.imgur.com/1cL83.png --> https://i.imgur.com/WPz2e.png?1
3. Now go into properties and write -launch
https://i.imgur.com/S9lAB.png?1
4. Now you should be able to run two applications You can start one from steam and the other one from the duplicate folder by pressing the launchpad icon!
Have a nice day everyone and hopefully you will find this helpful!
P.S There are also programs which does this without you having to copy your folders and wasting precious gigabytes! Such as; Sandboxie (http://www.sandboxie.com/)
http://isboxer.com/ (Not sure of this one, only heard of it through diablo 3)