Regd.UDDI server configuration in PI 7.1 and services registry

Question

Hi ,
i have gone through many forum posts before posting this , so expecting a genuine answer:) which can be rewarded:).
I am using PI 7.1 and trying  to taste the services registry flavour of it.
i followed the SAP Note 1267817 - Configure Services Registry proxy , but i am not able to assign the roles
SERVICES_REGISTRY_READ_ONLY or SERVICES_REGISTRY_READ_WRITE in Su01.
i get a message that such a role doesnt exist at all.
Qn1:Do i need  installed any software componet like UDDI etc, or do in  need to have uddi server
configured for this , if yes how to do that..
I have seen the help.sap link : I am struck at the point "Discovery URL host name", according to the help.sap it will come automatically , but in my case it has some Rivalry.
Qn2:How to configure UDDI server n PI 7.1
, any step by step guide which applies to PI 7.1 will help.
Qn3:What is the relation between tcode soamanager, services registry and UDDI
Qn4: I am not able to search my services in soamanager->business administration->WS administration
I have activated the services (Webservice Runtime)as mentioned in the Blog
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/d06b6392-cde7-2c10-8f8b-bdea5d781dd9

Answer 1

Thanks Raj,
This property specifies a URL for the host name of the *physical machine where the Discovery
API of the UDDI server is located.* Its value is set automatically by default.
I am not able to understand this present in [help.sap |http://help.sap.com/saphelp_nwpi71/helpdata/en/45/c1ea61a1194432e10000000a155369/frameset.htm]
what may be  the reason for   not able to assign the above roles as per the sap note given above?
Is there any componet needs to be installed line UDDI?Can a technical user role have this roles
accepted,i used my ID for configuration XI super user!
After following the note partially i.e w/o giving the user roles. when in rt click sender agreement and say publish
it slaps me with this error
Com.sap.aii.ib.core.uddi.RegistryCleintException:
A save request exceeded the quantity limits u2026Number of Business Entries Exceeds Your limit of 1(2)
But if i open Services registry  i can see that service got published.when i test in WS navigatore it
gives 503 service unavailable error.
How to delete unused published services
. Initialy i took the wsdl URL generated from
disply WSDL and published using publish tab in Services Registry , they dont have any key associated.
How to delete them?I can see any direct option
Regards,
Abhi