Quick snippet of PowerShell/PowerCLI that leverages the remote esxcli capabilities to install a vib. Credit to James Bowling (vSential) of http://vsential.com/

vibinstall.ps1

$esxhosts = Get-VMHost | Sort-Object Name

Foreach ($esxhost in $esxhosts)
{
	Write-Host "Starting install on $esxhost..." -ForegroundColor Green
	$esxcli = Get-EsxCli -VMHost $esxhost
	$esxcli.software.vib.install($null,$false,$false,$true,$false,$true,$null,$null, "/vmfs/volumes/NFS-01/_offlinebundles/net-enic-2.1.2.42-1OEM.550.0.0.1198611.x86_64.vib")
	$esxcli.software.vib.install($null,$false,$false,$true,$false,$true,$null,$null, "/vmfs/volumes/NFS-01/_offlinebundles/scsi-fnic-1.6.0.5-1OEM.550.0.0.1198611.x86_64.vib")
	Write-Host "Install completed on $esxhost..." -ForegroundColor Red
}