Create Customized ISO with PowerCLI

Add-EsxSoftwareDepot C:\Temp\VMware-ESXi-5.1.0-799733-depot.zip
Add-EsxSoftwareDepot net-e1001e-1.0.0-offline_bundle.zip

Get-EsxImageProfile
New-EsxImageProfile -CloneProfile ESXi-5.1.0-799733-standard -Name "ESXi-5.1.0-799733-NUC" -AcceptanceLevel "CommunitySupported"
Add-EsxSoftwarePackage -ImageProfile ESXi-5.1.0-799733-NUC -SoftwarePackage net-e1001e
Export-EsxImageProfile -ExportToIso -ImageProfile ESXi-5.1.0-799733-NUC -FilePath c:\Temp\ESXi-5.1.0-799733-NUC.iso