)pur_c01 cube enhancement

I want to enhace the cube 0pur_c01 and also the data source enhancement

1. I want to add some of the info objects to the cube which are mapped till the communication structure of the cube, Can i add them directly to the cube?

I mean it makes a cube in detail level. i want to add info objects like

0doc_num, 0doc_itm, 0doc_date, 0scl_deldate.

2. Which data source 2lis_02_itm or 2lis_02_scl should be enhanced?

i want 2 fields from EKBE table , they are budat and menge.

thanks in advance.

Sheshu