Why didn't it help? What were you expecting? What did you get?
sp_helplogins (sorry for the typo without the 's') returns two result sets.
The second is:
LoginName, DatabaseName, UserName, UserOrAlias
If the UserName is a Role, then UserOrAlias = 'MemberOf'
sp_helpuser within a database returns:
UserName, GroupName(This is the rolename), LoginName, etc.
It is true that the result sets are not formatted like your string below,
but they should have your answers.