Dude, it's TP - not SP
Here's what you have to do: Go to the Settings page. Enter "/tp/ssi_in.php" in the "Incoming Hit Script" field. Then you enter "/tp/out.php?p=75&fc=1&url=#url#" at "Outgoing Hit Script" for example, if you wanna override click scheme settings and send 75% to content for all trades and first click to gallery. You can leave "Outging Friend Link Script" empty.
You don't need to add "<?php virtual("/tp/ssi_in.php")?>" to any php file, the nubiles script does that for you if you enter the info like explained above.
I hope that helps.
PS: If you want different settings for your outgoing links, check
http://www.scriptpulse.com/tp/manual/outgoing-links.php or use the link generator inside TradePulse.