Hi Amado,
BICA is a tool which could be used to define/create PAS models based on BW queries and import data from bw queries to PAS models.
PAS is a flexible tool and you may want to try to write some PAS procedure to read data from other sources (databases, fatfile, etc) and then load to PAS. You could find the detail information in PAS help (Application Server> Help > Help Topics). Recommend to review the content regarding the PAS command keyword "read".
Regards,
Alicia