I managed to sort it with the str_replace() command.
Heres how for those who want the solution!
Line 253 (display.php) replace:
if ($lnx_PRT_options['prt_phpbb_latest_topic'] == "1") {
echo "$topic->topic_last_post_subject";
} else {
echo "$topic->topic_title";
}
With:
if ($lnx_PRT_options['prt_phpbb_latest_topic'] == "1") {
echo str_replace("Re:",'', $topic->topic_last_post_subject);
} else {
echo str_replace("Re:",'', $topic->topic_title);
}
