Infopakage data selection program

Hello Experts,

I need to edit a Info-packdge program which selects previous days data dynamically.

I need to change the selection of range previous 7 days range. There is no issue in writing the ABAP code.

But I want to know can I edit the exiting Info-package program ??

I have confusion if the same program is used some where else that will also be replaced??

can you confirm , if the every info-package program is unique and can not used in other Infopackage.

Thanks,

Ipsita