> $creds = Get-Credential
> $session = New-PSSession -ComputerName "myremotemachine.mydomain.com" -UseSSL -Credential $creds
> Copy-Item -Path "C:\my\folder\somewhere" -Destination "C:\path\on\remote\machine" -ToSession $session
Done and done. This assumes that you have PowerShell set up for PSRemoting on the remote machine with a certificate. There's plenty of other tutorials for doing that.