The task is fairly easy for a diy'er. You would be exposed the fuel so precautions should be taken. The injectors go in order from front of engine to rear so start at the first one and count in too #5. You only have #6 so should be that hard to figure out. Of course you did ask so this may be better left to a pro. One word of advice if you decided to diy bleed the fuel pressure from the rail.
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