Sentra SE Question

I'm looking at the B15 sentras; the SE to be exact and I want the Performance package on it. I got a few questions about the package:

1. How do you tell the sentra has the package?

I know that it will have a spoiler, sunroof, diffrent style of cloth seats a bigger radio (180 watts?) and most importantly a limited slip differential.

2.Is it possibble for a SE to have a spoiler, sunroof, diffrent interior and radio and not the limited slip?

Can it be just a sentra with all of that stuff added on?

3. How common is the Preformance Package? (Is it hard to find?)

4. I want a 5 speed, and if it has a 5 speed, with a sunroof, spoiler and sport interior, and the radio, what are the chances that its' a SE with the Performance Package?

5. All Sport packages are 5 speeds, right?

1 - spoiler, interior, limited slip, 16" alloys
2 - yes, but all of the extra stuff (spoiler, etc) would have to have been bought separately
3 - very common, in fact it's hard to find a non-PP SE
4 - very high - note: the sunroof has nothing to do with the performance package
5 - yes I believe so

The most reliable way to tell if it has the PP is to put the car in neutral, jack up the front of the car, and spin one of the front wheels. If the other one spins the same way it has a limited slip which means it has the PP, if the other one spins the opposite direction then it has an open differential, so it doesn't have the PP.