The injectors just pull out of the LIM when you lift off the plenum.
I know it's to late now but I always recommend cleaning the engine/intake manifold with degreaser before doing this job.
Make sure you lubricate the the injector O rings before re-fitting. A little bit of Petroleum jelly or Vaseline works wonders.
If you don't have the correct tool for removing the fuel lines (avail from supercheap for about $15) than you can use the top piece from a Pump water bottle. The white piece on the sipper top, Remove from the bottle, cut longways, slip over the steel fuel line and press it into the quick connect coupling and then you should be able to pull the quick connect coupling off. I always have a rag under the hoses to catch any fuel in the lines. You should always de-pressurise the fuel system before doing this.
MACE have the LIM gaskets you need. Tell em your from JC and he'l look after you.