Specifically in regards to the below part of another answer, is there somewhere I can manually set/edit what this utility is doing?
Powercfg Command-Line Options
In the command line you can type
POWERCFG -REQUESTSOVERRIDE PROCESS name_of_the_process
Display System and this will prevent Windows 7 to go to sleep while a certain process is running. I never used it so you must read the manual here.
POWERCFG -REQUESTSOVERRIDE <CALLER_TYPE> <NAME> <REQUEST>
Specifies one of the following caller type: PROCESS, SERVICE, DRIVER. This is obtained by calling the POWERCFG -REQUESTS command. Specifies the caller name. This is the name returned from calling POWERCFG -REQUESTS command. Specifies one or more of the following Power. Request Types: Display, System, Awaymode.
POWERCFG -REQUESTSOVERRIDE PROCESS wmplayer.exe Display System
To remove the power request override, use the -REQUESTSOVERRIDE option, but do not specify any type of override (System, Display, AwayMode) as in the following example:
POWERCFG -REQUESTSOVERRIDE PROCESS wmplayer.exe