easy ways to make a boring sampled instrument more interesti

Hey, I’m looking for some tricks to make boring sampled programs more interesting, somewhat more like some of the included patches,

including setting up new quick controls
using envelopes that are more realistic for stringed instruments
making the samples play more like real instruments

I know I probably have to just dig into it, but I was hoping there might be some feature that is similar to just loading a preset over a instrument or else importing a bunch of samples into a existing instrument which I like.

I think the best solution might be if it were possible to just import a group of mappings into a existing instrument. Has anyone done this yet?