hey refer this post and the reply from Saroj Saho who mentioned that if we go to Approval Process Config form and for the Review approval record, set the Process name as Change Adhoc and then try....give it a shot
you can see saroj link ://communities.bmc.com/communities/message/244677#244677
yes can do the same with below
1]create your own process in ap:adminstrator form e.g"test"
2]enter required foeld along with First approval field
3]this is change manager field name in db on CHG:Infrastructure
5]go approval process configuration form create/modify existing record with process name=test which we create above
6]your CR will automatically redirect to its particular manager