For the 1000 time -
The Eclipse turbo motor is not a straight-forward swap. Unless you have a reason to use this engine unknown to anybody else, its not worth trying to shoe-horn one into a Neon.
The ony engine Neon share with any DSM is 2nd gen N/A Eclipse/Talon which use the same 2.0L DOHC engine found in the Neon. The intake is on the back of the car instead of the front, but the head, cams and block are all the same.
A 2.4L DOHC does swap into the car, look here -
http://www.neons.org/forums/viewtopic.php?t=12557
Just follow the directions here. the mounts can be sourced.
Any turbo system for the DOHC engine is available for the 2.4L and yes it does bolt directly to the engine as the bolt pattern on the exhaust is the same.
You can also use a turbo/manifold combo from the SRT-4 Neon, which is a direct bolt-on also and can be found cheaply on the SRT Forums.
You can also use the oil squirters, turbo rods and pistons from the SRT-4. They all directly bolt into any 2.4L DOHC engine.
That would be a very powerful and affordable engine combo using a 2.4L engine and SRT-4 parts.
Good Luck