printing slides

Hello,

I have completed a roll of slide film with astrophotos (constellation
shots). Since this is my first try, i have only requested my lab to
process it without cutting. Today i got my film. Pictures seem good.
Now i don't know what to do next. I plan to cut the frames and select
the good ones for printing. Do you think i should print all of them?
If i cut the frames but not mount the slides, does it cause any
problem in printing or should i mount them before printing. I have not
shot any daylight or any other bright picture so it seems that there
is no other way to have my lab cut the slide. Or, is there any way?
If i don't plan to make slide shows, do i need to mount the slides?

Regards,

balci