Well, "why not shared container" as a starter? This is the ultimate re-usable component. Given that you're on such an old version and using server edition to boot, you don't have many options apart from File > Save As to make clones of a job design and modify the clones. As you get into ve...
After capturing the rejected rows from the Sequential File stage using a reject link, re-parse them for example using a Column Import stage or Transformer stage.
Ordinarily the entry for the field definition would be in the file dictionary rather than the VOC file. If you want to use SQL to change the record, then you will also need a VOC entry for the hashed file itself.
IA analyses use DataStage (in ANALYZEPROJECT) to process the source data. Presumably this project is on the engine tier machine that is not available. Solution: wait till it becomes available.
It's just as easy if the order has to be 1-2-3-4. Build sub-sequences for 2 and 4 that determine if it's their day to run and only run them if it is. (You could, indeed, do this in the one sequence, with multiple paths and Sequencers.)