Man, this ...... page messed up my mysql stuff seriously, ok, for those who had the same libmysqlclient.so.12 problems i had or for those people who get to the importing of all your database backup and it stuffs up. here is DAVE'S guide to upgrading to MySQL 4.1

# = commands to type
= = comments

====================================
# mkdir -p /home/backup/mysql
# nano mysql_backup.php

==
= Place the code below into the mysql_backup.php and save the file =
==

/*------mysql_backup.php---------*/
<?
print("mysql backup\n");
foreach (glob('/var/lib/mysql/*') as $fullname)
{
        $database = basename($fullname);
        $command = sprintf('mysqldump -a -B %s -c -v -Q > /home/backup/mysql/%s.sql --password=\'Our@db$IG\'', $database, $database);

        exec($command);
        print($database . ' : ' . $command . "\n\n\n");

}
?>

/*-----------------------------------------------------*/

# nano mysql_restore.php

==
= Place the code below in the mysql_restore.php and save the file =
==

/*------mysql_retore.php---------*/
<?

print("mysql backup\n");

$dir = '/home/backup/mysql/';
if ($fp = opendir($dir))
{
        print('running...');
while (($file = readdir($fp)) !== FALSE) {
     echo "$file\n";

     $database = basename($file);
     $command = sprintf('mysql < /home/backup/mysql/%s --password=\'Our@db$IG\'', $database);
     print($database . ' : ' . $command . "\n\n\n");
     exec($command);

}
closedir($fp);
}
else
{
        print('cannot open path ' . $dir);
}

?>

/*---------------*/

# php mysql_backup.php

==
= This will make individual backup's of all your databases, the reason i make it create scripts for each database
= instead of just pumping it all into 1 database, is because if there is a problem on like 486590 of a 5 million
= line file, its going to be a bitch to work with, this way it just simplifies matters
==

# quickpkg dev-db/mysql
# /etc/init.d/mysql stop
# emerge -C mysql
# rm -rf /var/lib/mysql/ /var/log/mysql
# emerge mysql
# etc-update
# emerge --config =mysql-4.1.14
# revdep-rebuild --soname libmysqlclient.so.12
# php mysql_restore.php
# mysql_fix_privilege_tables --defaults-file=/etc/mysql/my.cnf --user=root --password='PASSWORD'
# /etc/init.d/mysql restart

And thats it.
=======================================

Dave