MDMGX Object Type- CUSTOMER missing?? in ECC-Eh2

Hi,

I need to load CUSTOMER repository with Check tables. When i went into MDMGX (in ECC, Enhancement Pack2)--> Object Types, I found entries for Article, BusinessPartner, Catalog & Product. But Customer, is missing.

1) Is CUSTOMER related ports & Checktable entries are not provided by SAP(by default)? Should we maintain them manually for each of the 68 Check Tables in ECC? Is there a faster way to maintain these if we need to do them manually?

2) How can i use "Upload ports & Check Tables" using a file. What should be the file format?

Regards,

Siva Maranani