EXS 24 Logic Sampler Users Group

I've set up an orchestra template with hundreds of megs of instruments.
I'm using the same set up for multiple projects, often jumping between
projects in an evening.  Each time I open up a new song, I close the
other, but it seems to take time to, I assume, reopen all the sampler
instruments.  Any way to keep these open to save time?  Does it make a
difference if I don't close the other song?
Thanks for any thoughts!
Kurt Heinecke