My bathroom is very small. It started out as a closet under a staircase. It was very difficult to find a sink which would fit in this confined area. A lot of these super small sinks are made for specialty faucets which could only be mounted in single hose sinks. The sinks, and faucets are also very costly, and not readily available. This sink is 15" wide, and 12" from its front to the back. Although I did see slightly smaller models, it wasn't worth the cost for the extra inch of space. This model is made by Crane Plumbing Products:
http://www.explorerforum.com/photopost/data/503/Crane_model_1377V_15X12_wall_hung_sink_.JPG

You need the following parts to complete this task:
1. Sink.
2. Faucet & pop up assembly.
3. Teflon tape.
4. Plumber's putty.
5. Supply lines.
6. Sink hanging bracket. Some sinks such as this one come with a bracket.
7. Trap, extension pipe (solid or flexible).
8. Wrenches. Some specialty tools make the job go much faster.

This is the faucet with a 4 inch spread:
http://www.explorerforum.com/photopost/data/503/Sterling_from_Kohler_model_063589CG_two_handle_washerless_faucet_.JPG

This is the underside of the faucet with putty applied to the spacer:
http://www.explorerforum.com/photopost/data/503/Bottom_of_the_faucet_with_putty_.JPG

The pop up assembly needs putty on the top as well as the bottom to prevent leaks:
http://www.explorerforum.com/photopost/data/503/medium/Top_of_the_pop_up_assembly_with_putty_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Bottom_of_the_pop_up_assembly_with_putty_.JPG
The excess putty will come out after it's tightened.

It's very important to set the pop up assembly correctly in order to prevent it from banging against the sink when you lift the shaft on the top of the faucet:
http://www.explorerforum.com/photopost/data/503/medium/Rear_of_the_sink_with_the_pop_up_assembly_properly_adjusted_.JPG
Notice the 2 small holes in the corners. These holes are for adding screws for extra support.

You will need supply lines, a trap, extension pipe, wall hanging bracket, and screws:
http://www.explorerforum.com/photopost/data/503/medium/Water_supply_lines_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Faucet_pop_up_assembly_sink_bracket_and_waste_pipes_.JPG

Here are some of the tools in action:
http://www.explorerforum.com/photopost/data/503/medium/Ridgid_OneStop_Wrench_tightening_a_connector_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Ridgid_OneStop_Wrench_tightening_a_valve_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Ridgid_27018_model_2006_tightening_the_faucet_lock_nuts_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Ridgid_27018_model_2006_tightening_a_stainless_steel_flexible_line_.JPG

Here are some pictures of the plumbing connections:
http://www.explorerforum.com/photopost/data/503/medium/Front_view_of_the_trap_flexible_waste_connector_.JPG
http://www.explorerforum.com/photopost/data/503/medium/Side_view_of_the_trap_flexible_waste_connector_.JPG

It's finished!
http://www.explorerforum.com/photopost/data/503/medium/Assembled_sink_faucet_.JPG

I am getting ready to do that in my drive in soon. I got to put on up exactly like that