SRM 7.0

Hi,

We are planning to integrate SRM 7.0 with EP. My qeustions are,

1) Do we get SRM Business packages, like ESS/MSS

2) If it is BP's, then are they developed in Webdypro ABAP or JAVA.

3) If I want to customize, what do I need.

If you can point me to any architectural documentation or implementation documentaion, that would be great.

Thanks.