HR ABAP : Track Master Data changes for multiple countries

Question

Hi experts,
I am in a Global HR Implementation & Rollout Project. We are creating Outbound Interfaces for 3 countries to export pay, time and general data to the 3rd party systems in those local countries. (Payroll is outsourced there).
As well as sending New Joiners data every month, we need to send Changers data also to all those 3rd partys every month before the Payroll runs.
I know 2 solution for this :
a). Using Change Documents - Tcode : SCDO ..etc
b). Using the report RPUAUD00.
c). Using RBDMIDOC.
Query :
1). Are these the only solutions ?
2). Whats the best solution for doing this for a Global Rollout project ? I need to track master data change for different countries for different set of Infotypes and fields. I need to send those Changers data as well as the New Joiners data through the Outbound Interface to all the local countries.
This year we are doing for 3 countires, next year for 9 more countries, etc. Whats the best solution keeping this in mind ?
Restrictions :
1). Our Client HRs dont want us to disturb the report RPUAUD00 as they use that regularlly and want the flexibility to configure the configs themselves.
2). If I must need to create and activate Change Documents for ALL individual fields, is there an easy way of doing this ?
3). I need to send this Changers data from SAP to Legacy system, so dont know if RBDMIDOC will be a good solution for this. Any comments ?
Just want the best possible and feasible solution for this issue.
I will be please to allot point to anyone who gives a good solution.
Moreover will be Thankfull also !!
Cheers.

Answer 1

I have used PU12 for same purpose at a similar client. It will fulfill all your needs I guess, but the learning curve is big. Search for "Interface Toolbox" or "PU12". Basically your search will end-up in these two links:
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/PAXX/PYSOME_INTERFACE.pdf
HR Interface Toolbox - PU12