Altissimo Fingerings?

To quickly answer your question:
Try the A first, it's much easier to hit even though it's higher- LH2,3, RH1,2, 8ve (that's your C/A, G, F, and E finger plus the octave key). Really, you only need the LH fingers, but the other two will help with tuning.

G#- LH1,3, RH1,P3, 8ve (that's your B, G, and F fingers, and the middle palm key on your right hand, the one you use for the alternative C fingering, and of course, the octave key).

Now, for other altissimo notes, and pictures of these fingerings, I suggest going to http://cafesaxophone.com/saxophone-altissimo.html. This gives you suggested fingerings for altissimo notes up to D (adding a mi6 above your F# range). It also gives a brief description about what altissimo is, and how to work up to learning it. If you have any questions about any of this process, I'd be happy to explain it in greater depth, just let me know. Also, altissimo is really a professional endeavour, so don't be too discouraged if you don't get the notes right away (you might, especially the A, but normally it takes a lot of practice before you can do it with any sort of control). If you have trouble, just work on your overtones, and I bet in a few months' time you'll at least have that A.

The site above actually has a lot of useful saxophone tips from very basic to very advanced. I suggest every saxophone player give it a look through.