Considering Primavera Contractor

Greetings,

I have long used MS-Project with lots of suffering and frustration. I am considering to purchase Primavera Contractor.

My needs are not so sophisticated but I would like to have answers to the following questions:

1. Is it possible to group resources according to a certain hierarchy? e.g. if Jack and Jill are working in Department A which is a part of Division B can I report resource costs on individual, departmental and divisional level (up to howmany levels?)

2. Is it possible that when a task finishes in October and payment is made in November that I can register the payment in November without necessarily extending the duration of the task?

3. Can I register each invoice separately or do I have to sum up all expenses into one single cost for each task/resource/assignment?

4. Is it possible to report all resource work/cost for all tasks belonging to a summary task without having to list all the sub tasks? e.g. if summary task A has subtask x, subtask y and subtask z; Paul is working 6 hours for subtask x and 4 hours for subtask y; Peter is working 3 hours for subtask y and 5 hours for subtask z and John is working 3 hours for each of subtasks x,y,z. Can I report

SummaryTask A
Paul 10 hours
Peter 8 hours
John 9 hours

I manage this in MS-PJ via a recurrent subroutine in VB.

5. Is it possible to program Primavera Contractor by VB or some other language?

Sorry for the long mail and thanks for replies.
Kamil