To create yourself extra information types, you still have to insert some metadata yourself. Familypack G promises that this will be the last time.

Insert into Pay_element_type_info_types
(
information_type,
active_inactive_flag,
multiple_occurences_flag,
description,
legislation_code,
object_version_number
)
Values
(
'XX$your type$',
'Y',
'Y',
'$your meaningfull description$',
'BF',
1
);

The element_type_id is not available in the screen before saving, so you can not use it as a context for valuesets.