Don't worry if you've lost the manual for your 2000 Jeep Cherokee Sport, there are plenty of sites offering replacements. At PacificCoastManuals.com, you can download a printable version of all editions of the Jeep Cherokee Sport, including the 2000 edition, for a charge of $7.95.
If you'd rather look elsewhere, try xjjeeps.com, where you can download the service manual for your 2000 model, as well as its parts catalog and specifications. Other accessories for this model of jeep are also offered.
Ownersmanualsforcars.com provide free downloads of owner's manuals for the various Cherokee Jeeps, as well as repair and maintenance manuals.
Finally, there is cherokeeforum.com, moderated and used by Cherokee owners like yourself. They should be able to provide you with copies of owner's manuals, or at least point you in the right direction. It looks like you're not the only Jeep driver missing a manual!
This YouTube user has posted film of an electronic copy of the Cherokee Sport 2000 Jeep which might help: