The answer is yes, but you'll have to write a small application to it. I'm guessing you want to create roles in batch more. The IDAPI (SOAP interface) supports a create role service. Below is a cut from the manual.
Check out the API manual.
Request "CreateRole"
schema
<xsd:element name="CreateRole">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Role" type="actu:Role"/>
<xsd:element name="IgnoreDup" type="xsd:boolean"
minOccurs="0"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
Request
elements
Role
The properties of the role to create. A name is required.
IgnoreDup Specifies whether to report an error when creating the role if one with the
same name already exists. Actuate iServer always rejects a duplicate request
regardless of the IgnoreDup setting. If True, Actuate iServer does not report an
error. If False, Actuate iServer reports an error. The default value is False.
Description CreateRole creates a role. CreateRole is available only to users with the
Administrator role.