With-Env.ps1

# this is required 
Import-Module pscx

# just drop this into your $profile, somewhere after the above import-module line
function With-Env (
	[string[]]$vars,
	[Parameter(Position=1)]
	[scriptblock]$f
) {
	Push-EnvironmentBlock
	Foreach ($var in $vars)
	{
		$key,$val = $var -split "=",2
		Set-Item -Path "env:$key" -value $val
	}
	Invoke-Command -ScriptBlock $f
	Pop-EnvironmentBlock
}