I know there is a product sold at Home Depot for killing off stumps, and the roots. Just can not remember what it is called You might find it also, at any yard and garden store. Is it a big stump??? If so, my grandpa used to take BBQ briquets, and stack them on the stump and light em. It burned the stump down below ground line, and killed it and the roots. Or you can do it the hard way and dig it all up with a shovel. When I want to remove and not keep a large bush/shrub I wrap a rope around it and tie it off to my truck and jerk it out of the ground.
Hope some of this helps.

* * * *
I won't be wronged, I won't be insulted, and I won't be laid a hand on. I don't do these things to other people and I expect the same from them." John Wayne
http://community.webshots.com/user/johncandy1005