Roles for Support help desk

Hi Friends,

We have created support help desk in Sol. Mgr. I wnat to create below roles :

SAP_SUPPDESK_CREATE

SAP_SUPPDESK_PROCESS

These are std. sAP roles, but in our system we didn't found these. Shall I know where can I get details about these. I also want to know what are the other roles related to help desk.

Regards,

Sai Krishna