Need Help for Integration

I'm a student from UTAR and required to do a student project whereby I am supposed to integrate if possible open source technology to SAP.

I have few questions that I would like to know about :

1. How can I able to download SAP JCo from? Since I am still a student and do not have the budget to purchase SAP products.

2. Can SAP Netweaver Developer Studio be integrated with a trial version of SAP Solution such as Business Object?

3. Can I use Eclipse to replace SAP Netweaver Developer Studio for integration? Because SAP Netweaver Developer Studio seems to be complicated to me as a student who does not have any experience.

I really need help, please.

Regards

Lai Hung