Flooring Tile - tile over drywall (backsplash)

I would like to place regular bathroom tile (ceramic tile?) as a back splash in our laundry room over the utility sink for my wife. All that is there is drywall that has been painted. Can anyone help with the steps to doing this, and how far apart should the tiles be (right next to each other like a bathroom)? Any help would be appreciated to start and finish this project.

Make sure the wall is clean. Use a degreaser and maybe a deglosser, like TSP.

Get a bucket of pre-mixed mastic. (this is one of the few applications where mastic is ok)
Some of the 4x4 ceramic tiles have a pair of spacers set on the edge, so if so, just put them up.
If these do not have that spacer hump, get a bag of plastic spacers. Depending on your tile, select a spacer. larger tile gets larger space (generally)
I'd guess 1/8th for 6x8 tile.
It's easiest for me to butter each tile, but some perfer to spread the mastic out over an area, and then fill with tile.
Let it set overnight, then grout.
Do some reasearch on grouting cause it can be tricky.

Enjoy.

OKay, so from what I understand, I clean the wall with TSP, and let it dry. Then spread mastic on the wall or tiles. Let this set overnight. Then I place grout on the wall, then place the tiles on the grout. Is this correct? (sorry if this is confusing to me, I haven't worked with tile like this before).

Nope, you use the mastic to glue the tiles to the wall and let it set. The Grout is then applied to fill the joints.

If there's a tile store or improvement center near you they often have demos/classes showing how to do it.

[QUOTE=Joe.Carrick]Nope, you use the mastic to glue the tiles to the wall and let it set. The Grout is then applied to fill the joints.

Thank you!