change payment and shipping

hello,

i want change shipping and payment on shop module to be shipping and payment dosmetic in indonesia, please tell me how to change the code...

i want use shipping method courier and auto calculated on checkout form :
1. JNE (http://jne.co.id/)
2. TIKI (http://www.tiki-online.com/)
3. POS (http://www.posindonesia.co.id/)
4. WAHANA (http://www.wahana.com/)

for payment i want use :
1. BCA
2. MANDIRI

please tell me what should i do, because i already change the code but not working, thank you very much