VMPC2000XL is an emulator of the classic Akai MPC2000XL sampler/sequencer.
1) Grab the macOS or Windows installer from the downloads page. Ubuntu x86_64 binaries available, and for openSUSE and Fedora there are ZYpp packages.
2) Check out the keyboard shortcuts, and grab a copy of the original 2000XL manual.
3) Dump your samples and other files you want to load in
/Users/you/Documents/VMPC2000XL/Volumes/MPC2000XL. This is also where anything you save will be stored.
Warning: Files in that directory are renamed by the emulator just like on the real 2000XL! This means you shouldn't put the only copy of some important files there. Your data might become corrupted.
4) Report bugs and feature requests here.