Question re JFK connection

On the way back from the summer hols on Monday 25th from MCO. Won't be too sorry (I never thought I would ever say that, but the weather has been atrocious) and the only way I could utilise a free PE companion flight AND a free reward upgrade was to come back via JFK, flying up from MCO on Delta.
Now, there are a couple of questions that I just can't find the answer to (I have had plenty of spare time looking out over the rental home's pool at the pouring rain):-
1) Speaking with the Gold team before I left they said I would be able to use the MCO lounge even though I am on Delta for that segment as it is all one booking (booked through Virgin). They said Delta will see I am Gold and will allow it knowing the next segment is on Virgin. Can't help feeling I am going to look a fool when I ask for access, hope I'm wrong.
2) When changing at JFK will I need to collect baggage?
3) Please God, I won't need to go through security again?
I do want some time in the JFK lounge as I have not been there before, but there is only a 1hour 50 min turnaround.
I have changed both to and from MCO in the past, but it has always been on the same carrier - I have done Delta (loads of times until the family couldn't stand them any more, but at least my daughter is a Silver member with them, much to her disgust !), Continental, and US Airways. On each of these it has been relatively pain free as no baggage pick-up required and no re-doing the check-in and security.
Any advice gratefully received.
Spiceke
Now, there are a couple of questions that I just can't find the answer to (I have had plenty of spare time looking out over the rental home's pool at the pouring rain):-
1) Speaking with the Gold team before I left they said I would be able to use the MCO lounge even though I am on Delta for that segment as it is all one booking (booked through Virgin). They said Delta will see I am Gold and will allow it knowing the next segment is on Virgin. Can't help feeling I am going to look a fool when I ask for access, hope I'm wrong.
2) When changing at JFK will I need to collect baggage?
3) Please God, I won't need to go through security again?
I do want some time in the JFK lounge as I have not been there before, but there is only a 1hour 50 min turnaround.
I have changed both to and from MCO in the past, but it has always been on the same carrier - I have done Delta (loads of times until the family couldn't stand them any more, but at least my daughter is a Silver member with them, much to her disgust !), Continental, and US Airways. On each of these it has been relatively pain free as no baggage pick-up required and no re-doing the check-in and security.
Any advice gratefully received.
Spiceke