Derailleur Bicycle question hurry suppers on its way?

[emofeelingsad]

I need every possible scenario of Derailleur adjustment, gear cable length and bike repair at hand.

 

[do you know me?]

First you must explain why something urgent for you becomes an emergency for me...

 

[Bob A]

http://bicycletutor.com/part/shifter/

http://bicycletutor.com/adjust-rear-derailleur/

http://bicycletutor.com/part/front-derailleur/