I have a batch file that starts an app with a lot of command-line parameters:
\"C:\\Program Files (x86)\\Common Files\\Microsoft Shared\\DevServer\\11.0\\Web
I think this other Stack Overflow answer would solve your problem: How do I run a bat file in the background from another bat file?
Basically, you use the /B and /C options:
/B
/C
START /B CMD /C CALL "foo.bat" [args [...]] >NUL 2>&1