I guess you mean adding config values like STRFORUMTITLE?
In this case here's your code:
[INSERT]
CONFIG_NEW
(C_VARIABLE,C_VALUE)#('AUTOPM_ON','VALUE')
(C_VARIABLE,C_VALUE)#('AUTOPM_SUBJECTLINE','VALUE')
(C_VARIABLE,C_VALUE)#('AUTOPM_MESSAGE','VALUE')
[END]
Simply replace VALUE with your desired values.
Note that the C_VALUE field is limited to 255 characters.