Results analysis enhancement / User exit

Hello Experts,

I would need help for enhancement on Results analysis.

1) When I save the Project/WBS Results analysis data , in which table it will be saved.

2) I wanted to make some changes in WBS Results analysis output before saving it , which user exit / function module will be suitable for this purpose.

3) I also would like to play with total plan cost and actual cost of WBS before saving the Results Analysis data which user exit / function module will be suitable for this.

4) I am going to used down payment ( G ) in valuation and also need to small correction on it. We we have any user exit for this.

5) Do we also have user exist for posting rule and settlement of RA data  to FI and COPA.

Thanks in Advance,

Channappa