I am also trying to achieve the same thing. What is in the custinfo[1];?

printOptions.consolstatement='T' will print consolidated statement.

You can write a suitelet script and then call the script from c#. I was able to get it done after trying several other things...

Have you solved this problem? I am looking for the same.

Hi amangana, I can help with that. Thank you

I had done many form customizations. If its just adding 2-3 fields to each form then it will be a 3-4 hr job at the most...

How do you want the approval process done? How did you try create it and what was the issue?