it has an inbuilt amp? yes. it'll work. Your headunit only needs 1pre-out (a left and right channel of rca outputs) to power it...
You'll need a power wire, a remote wire, a ground wire, and rca's.. with that, you connect the power to your battery straight up, with a fuse as close to the battery as possible. the ground goes to the nearest bolt or something you can, which has good contact with the body (say like, a seat bolt or something, put the ground terminal thingo on the body side.. but make sure to file back any paint on the body (where the terminal will touch it) so it has good contact.
Then the remote wire and rca's, run them up to the headunit, the remote wire will connect straight to a wire in the back of your headunits loom. should be blue with white stripe, or just blue.. either or.. should have 'remote' on it either way.. and rca's, just plug into your headunits back.

If you aren't confident in doing it yourself, take it to a local car audio store, and get them to install it and tune it for you, for best results.

Also, you can use the factory speakers no problem. you shouldn't have any issues as long as you like how they sound.

Cheers