.bat files and steam big picture

[zenithex]

So let me start off by saying, thank you so much for making PPSSPP.

Anyway, to the point. I've written like one other .bat file before in my life and it worked then but I'm currently having trouble. I want to be able to take screenshots using steams big picture and as such I need to make it so steam recognizes PPSSPP and puts over the interlay... So I've written this, but it doesn't seem to work...
C:\Users\Calvin\Desktop\Game Shortcuts\Emulators\PPSSPP(PSP)\ppsspp\PPSSPPWindows.exe C:\Users\Calvin\Desktop\Game Shortcuts\Emulators\PPSSPP(PSP)\Games\iso The Legend Of Heroes - Trails In The Sky.iso

Command Prompt Shows up and then quickly disappears. I've heard of others getting this to work but for the life of me, I'm having no such luck.
Any help would be fantastic