what should I do to develop web dynpro app to connect erp2004?

hi:

here I was assigned to dev the web dynpro app to connet the tables in erp2004. what can I do?

system :landscape:AIXOracleWAS640+ERP2004

IDE: Netweaver developer studio

Architect:web dynpro >java >rfc-->table

1.do I need configure the SLD in R3? how?

2.how can I configure the jco

3.Is there rfc class directly usable for import?

4.Is there handy-on book or guide to dev the webdynpro app to connect erp2004 in similiar enviorn.

thanks a lot!