Set permissions for IIS 7.5

I'd like to find out how to set permissions for IIS 7.5 via the command line.  This is what I have tried:

Set "MachineName=Docfxit"

Set "UserName=IISUser"

CD \Program Files\fileacl

FILEACL "C:\HostingSpaces\Docfxit" /S "%MachineName%\ASPNET":RrRaRepWwAWaWeX /S "CREATOR OWNER":U/RrRaRepWwAWaWePXDDcO/RrRaRepWwAWaWePXDDcO /S "%MachineName%\IUSR_%MachineName%":RrRaRepWwAWaWeX /S "%MachineName%\IUSR":RrRaRepWwAWaWeX /S "%MachineName%\%UserName%":RrRaRepWwAWaWePXDDcO /S "NT AUTHORITY\NETWORK SERVICE":RrRaRepWwAWaWe /PROTECT

ICACLS C:\HostingSpaces\Docfxit /grant "IIS AppPool\DefaultAppPool:F"

cmd

This is the output I get:

C:\Dnload\9xAddons>Set "MachineName=Docfxit" C:\Dnload\9xAddons>Set "UserName=IISUser" C:\Dnload\9xAddons>CD \Program Files\fileacl

C:\Program Files\fileacl>FILEACL "C:\HostingSpaces\Docfxit" /S "Docfxit\ASPNET": RrRaRepWwAWaWeX /S "CREATOR OWNER":U/RrRaRepWwAWaWePXDDcO/RrRaRepWwAWaWePXDDcO / S "Docfxit\IUSR_Docfxit":RrRaRepWwAWaWeX /S "Docfxit\IUSR":RrRaRepWwAWaWeX /S " Docfxit\IISUser":RrRaRepWwAWaWePXDDcO /S "NT AUTHORITY\NETWORK SERVICE":RrRaRepW wAWaWe /PROTECT no SID for trustee Docfxit\ASPNET C:\Program Files\fileacl>ICACLS C:\HostingSpaces\Docfxit /grant "IIS AppPool\Def aultAppPool:F" processed file: C:\HostingSpaces\Docfxit

Successfully processed 1 files; Failed processing 0 files

1. I get an error No SID for trustee.
2. 2. The users aren't set in settings.
3. 3. I don't know if these are the correct users for IIS 7.5.
4. Thanks, Docfxit