Strictly speaking about scheduling, you cannot schedule jobs in process designer. You can call jobs from the engine using a batch file once they have been package as a DJAR. You will need to use a tool such as integration manager to package DJAR files. Below you can use the following Batch Script template to begin the process of scheduling your projects using Windows Task Scheduler.
Set logFile="C:\Program Files (x86)\Pervasive\Cosmos9\MyProject\LogFilename.log"
:: Set EngCosmos.ini File Location
Set iniFile="C:\ProgramData\Pervasive\Cosmos9\Common\cosmos.ini"
:: Set Macro Location
Set macroLocation="C:\Program Files (x86)\Pervasive\Cosmos9\MyProject\macrodef.xml"
:: Set Process Location
Set importMasterProcess="C:\Program Files (x86)\Pervasive\Cosmos9\MyProject\xmldb\p_MyProcess.djar"
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:: RUN PROCESS ::::::::::::::::::::::::::::::::::::::::::::::
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djengine -pe -l %logFile% -mf %macroLocation% "C:\Program Files (x86)\Pervasive\Cosmos9\MyProject\xmldb\p_MyProcess.djar"