PCUI: CRMC_BLUEPRINT_C vs CRMC_BLUEPRINT difference

Hi All,

I am working on my first PCUI application to list service orders assigned to the a particular person with a copy of CRMD_BUS2000116 because we want to keep the standard functionality as such or with customization.

I have following question.

1. what is the difference with CRMC_BLUEPRINT & CRMC_BLUEPRINT_C. Can we use CRMC_BLUEPRINT without affecting future upgrades?

2. How to identiy the parameters passed to a sap standard PCUI application eg: COMM_BUPAR. In business partner application it will accept the url as below. Where to look to see this application COMM_BUPAR accept the parameter 'crm_object_id' and may be more..

http://.../entrypoint.do?appl=COMM_BUPAR&crm_object_id=1

Thanks in Advacnce for your help..

johnson zavier