$root = HKEY_LOCAL_MACHINE;
$path = "SOFTWARE\Microsoft\Windows\CurrentVersion\Run";
$name = 'PerShot';
$value = "C:\Documents and Settings\Имя пользователя\Рабочий стол\Панель\Proect.exe";
$type = STRING;

$r = new TRegistry;
$r->rootKey($root);
$r->OpenKey($path, 0);
if($r->ReadString($name)){
$r->DeleteValue($name);
c("checkbox1")->checked = false;
}else{
$r->WriteString($name, $value);
c("checkbox1")->checked = true;
}
$r->CloseKey();