I don't know of any scripts that will do this, but if you build a base form as a starting point and download it to your machine it can be view as XML. Once you have an idea of the structure you could probably add additional fields without much difficulty then re-import it back into Forms as a new process.

However, it might end up being more work than just creating the fields because you would need to figure out what the different attributes do and how they should be configured.

Below is an example of what a Field object looks like when you get the XML for a Forms process.

<field>
    <formId>1491</formId>
    <fieldId>1</fieldId>
    <position>0</position>
    <label>Test Field</label>
    <subLabel i:nil="true" />
    <helpText i:nil="true" />
    <tooltip i:nil="true" />
    <type>text</type>
    <isRequired>false</isRequired>
    <isUnique>false</isUnique>
    <size>50</size>
    <length i:nil="true" />
    <cols i:nil="true" />
    <rows i:nil="true" />
    <defaultvalue />
    <format i:nil="true" />
    <rangeType i:nil="true" />
    <rangeMin i:nil="true" />
    <rangeMax i:nil="true" />
    <layout i:nil="true" />
    <choices>[]</choices>
    <subfields i:nil="true" />
    <classNames i:nil="true" />
    <isReadonly>false</isReadonly>
    <useVal>false</useVal>
    <isDigits>false</isDigits>
    <isAllowOther>false</isAllowOther>
    <otherChoice i:nil="true" />
    <customFieldName i:nil="true" />
    <validationPattern i:nil="true" />
    <optionLabel i:nil="true" />
    <optionLabelex i:nil="true" />
    <isRepeatable>false</isRepeatable>
    <attributeId>10083</attributeId>
    <lookupPopulatedParentList />
    <fileExtension i:nil="true" />
    <fileMaxSize i:nil="true" />
    <currencyFormat i:nil="true" />
    <isUserInSummary>false</isUserInSummary>
    <belongToForms xmlns:d7p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays" i:nil="true" />
    <loadDefaultSignature>false</loadDefaultSignature>
    <memberId>9999</memberId>
    <memberPath>9999</memberPath>
    <memberName>Test_Field</memberName>
    <attributeType>text</attributeType>
    <isPreviousDataPreserved>false</isPreviousDataPreserved>
    <isSeparatorEnabled>false</isSeparatorEnabled>
    <maxDecimalPlaces i:nil="true" />
    <hideSectionLabel>false</hideSectionLabel>
    <showtime>false</showtime>
    <allowQR>false</allowQR>
    <appendChoices>false</appendChoices>
  </field>