[Haskell-beginners] Combining IO and Either function to "EitherT e IO a"

Hey, I have a function |func1 :: IO String | and another: |func2 :: String -> Either String String | and I want to combine them, giving the output of the first as the input as the second. |func3 :: IO (Either String String) func3 = do tmp <- func1 return (func2 tmp) | Ok, possible. But I rather would like a result of type "EitherT String IO String". So how can I combine these function in a smart way, to get the needed result? Thanks! Nathan