Locate your source for apache 1.3.36
cd ??/apache_1.3.36/modules/standard/
/usr/local/apache/bin/apxs -c mod_speling.c
/usr/local/apache/bin/apxs -i -a -n speling mod_speling.so
vi /usr/local/apache/conf/httpd.conf
<VirtualHost x.x.x.x>
ServerAlias www.xxx.com
ServerName xxx.com
CheckSpelling on
</VirtualHost>
/usr/local/apache/bin/apachectl restart