Entering internet expense reports on behalf of other employees

 Hi,

Can one person in the organization enter the internet expense reports of all other emloyees.  Can we setup this in internet expenses..If so, can you pls provide me any document reference or any document explaining how to do it.

How to setup the mileage schedule to calculate the mileage based on the miles travelled by the employee in internet expenses.

Thanks & Regards,

AK