Script to backup Exchange 2010

I'm new to power-shell scripts and have come across specifically this one. 

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CreatedByAndrewZwieg6-20-2013#Date Variable$DAY=(Get-Date).DayOfWeek# Backup Destination$DESTINATION=\\BackupServer\Share\Exchange2010# Backup All Exchange Files in D:/ to Seperate Folderwbadminstartbackup-backuptarget:$DESTINATION\$DAY-include:D:\-allCritical-vssFull-quiet>C:\$DAY-Backup.txt

I'd like assistance as to what to put where. I've got the location to my Exchange database.

C:\Program Files\Microsoft\Exchange Server\V14\Mailbox Database 0517542772\Mailbox Database 0517542772.edb

The backup target location will be at F:\Exchange Backups. This location is also shared as \\MPLSERVER01\Exchange Backups (if a network location is needed)

Thanks in advance!