I want to replace my fire suround help.......?!?

It depends on what the surround it made of. If it is brick you can tile over it. If it is a tile you can remove the tiles by popping them off. If you do this you want to be careful not to damage the substructure. I had white ceramic tile around my fireplace and on the hearth and I replaced it with slate tiles. I seen on youtube they said you can use a belt sander to roughen the surface and tile over. THIS DOES NOT WORK!!! If it is tile then the tile must be removed. You will want to support the tiles that are over the top portion. We took a board and screwed two boards to it just as a support or the tile will slide a little when they are setting up. Hopefully you do not have to mess with the hearth. I started to chisle the tile up but ended up taking it completely out and building it back up. Make sure you use a versabond or one that has a bonding agent in it.