This can be easily done by editing Template file public_display_profile.pl
just remove the sections that you want to keep the stuff priavate.
remove those as a example
if (($vars_registration{custom7_field_use} ne "DEL") && ($vars_registration{customfield7} ne "") && ($user_profile[32] ne "")) {
print <
$vars_registration{customfield7}:
|
$user_profile[32]
|
THISFIELD
} # end field
if (($vars_registration{custom8_field_use} ne "DEL") && ($vars_registration{customfield8} ne "") && ($user_profile[33] ne "")) {
print <
$vars_registration{customfield8}:
|
$user_profile[33]
|
THISFIELD
} # end field