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InstCM.exe - installs a downloaded update
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Parameters:
/n		- CM Service profile name
/d 		- Service Dir
/e 		- .exe name to launch. Filename format (name.exe)
/sleep 		- Optional sleep time
/mbtype 	- Optional message box type (0 - default, no message box; 1 - OK message box, 2 - YES/NO messages (gives user control to install or not))
/text 		- Optional message box text (quoted text)
/o 		- Optional parameters (this needs to be the LAST parameter, because everything after /o flag is considered as an optional parameter)

Usage:
/n %ServiceName% /d %ServiceDir% /sleep sleep_time /e exe_name /mbtype msg_box_type /text quoted_text /o optional_params

Example:

/n %ServiceName% /d %ServiceDir% /sleep 0 /e profile.exe /mbtype 1 /text "A new version will be installed." /o /q:a /c:"cmstp.exe /s profile.inf"
/n %ServiceName% /d %ServiceDir% /e profile.exe /mbtype 2 /text "Do you want to install a newer version?"