How do you upload sounds to the MPC2000?
The following solution should work for the 
MPC2000 and the MPC2000XL version using the floppy disk drive. The task may be slightly different if loading sounds from the SCSI drive or other type of storage.
1. Press DISK (3 on the numeric keypad) while holding down the SHIFT key to enter disk mode and display the following load screen.
2. Select the disk you want to load to in the Device: field. If you are saving to a floppy disk, select Floppy.
3. Select the file you want to load in the File: field.
4. Press DO IT[F6] to load a sound file. The filename of the loaded sound will appear in the File: field.
5. Press PLAY[F3] to listen to the loaded sound.
6. Select the note number or drum pad you want to assign the loaded sound to in the Assign to note: field. It is possible to rotate the DATA wheel or select directly by playing the pad. Select --/OFF by rotating the DATA wheel if you do not want to assign the sound to a note number.
7. Press KEEP[F5] to assign the loaded sound to a drum pad. If you do not wish to keep the loaded sound, press DISCARD[F4] to discard the loaded data.
Source: MPC2000XL User Manual
MPC FAQs
What does MPC stand for?
What is the difference between the MPC2000 and MPC2000XL?
