Enrolment

I have ascertained that the redirect code I need for non registered students already exists on the index.php under login.

The bottom section of code, which may not post here, checks to see if the variable $show_instructions is set and if so, allows the person to go to signup.php

Where would I set $instructions?

Thanks
[CODE]
<?php if ($show_instructions) { ?>
<div class="signuppanel">
<h2><?php print_string("firsttime") ?></h2>
<div class="subcontent">
<?php if (is_enabled_auth('none')) { // instructions override the rest for security reasons
print_string("loginstepsnone");
} else if ($CFG->registerauth == 'email') {
if (!empty($CFG->auth_instructions)) {
echo format_text($CFG->auth_instructions);
} else {
print_string("loginsteps", "", "signup.php");
} ?>
<div class="signupform">
<form action="signup.php" method="get" id="signup">
<div><input type="submit" value="<?php print_string("startsignup") ?>" /></div>
</form>
</div>
<?php } else if (!empty($CFG->registerauth)) {
echo format_text($CFG->auth_instructions); ?>
<div class="signupform">
<form action="signup.php" method="get" id="signup">
<div><input type="submit" value="<?php print_string("startsignup") ?>" /></div>
</form>
</div>
<?php } else {
echo format_text($CFG->auth_instructions);
} ?>
</div>
</div>
<?php } ?>

[/CODE]