The ESV is already there, it is called E11 (short name). Download it from the Digital Bible Library (by going to File, Install Resources.) The NLT, I don’t know. Because resources now come from the DBL, it’s a question of whether the copyright holder will licence NLT to be used by your particular category of user in Paratext. Apply directly to the copyright holders of NLT, requesting that they release their version to Paratext users.