i just wanted to publish this information for any ROM builder if it can be changed in future releases, or for reference for other people.
Settings for Dominican Republic:
Network Name: ORANGE
Network Number: 37001
no autenticantion or any other setting
1900 Mhz GSM/ 900 Mhz 3g
Network Name: CLARO
Network Number: 37002
No other Setting
850/1900Mhz GSM /850 Mhz 3g
Network Name: VIVA
Network Number: 37004 (Thanks Ajape for the confirmation)
not sure about auth. I Believe is user and password 'viva' without the '
if anybody knows anything else, please post.if possible, for ROM cookers, update the auto detection settings in future releases (i don't know if it is possible or how)