replacing injector in Cavalier

Could someone walk me through the procedure/give me tips on how to replace one sole fuel injector in a 95, 2.2 Chevy Cavalier (160,000 miles)?
Have a case where I'm smelling a strong gas smell from the front end.
Tracked it down to a fuel injector, around which I could see drying gas. So, I would think that I would have to replace just this single injector...or would it be more likely to be the o-rings I keep hearing about. Regardless, I'm unsure of the procedure. The Chiltons manual has me taking apart the entire fuel rail, which I'm sure I don't need to do but am not sure how to proceed.
Any help would be appreciated.
Brian
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try autozone.com/repairinfo

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Hiya...
Which end of the head is the fuel residue found? Drivers' side or passenger side? If it's passenger side, that is where the return pipe for the fuel system is. I know from experience that if that pipe is not seated correctly, or the flange that it bolts onto the manifold with develops a crack OR the o-ring inside the pipe is shot or unseated...fuel will leak out of there quite steadily once the fuel pump is switched on. It's a common pain every time I've disassembled either the head or the manifold, or both...but it's an easy fix.
B.
PS: If it's one of the injectors...well, that's one I haven't done yet...so you might want to go with a Haynes or Chilton manual for it. I prefer Haynes, as Chilton is generally written for someone with a well-equipped shop, where Haynes is written more for an average shadetree mechanic with more generalised tools. Good Luck!
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The leak is on the driver's side, closest the fuel pressure regulator.
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