MySql 4.01 and libmysqlclient.so.10

I have installed MySql 3.23.49, PHP 4.06, and Apache 1.3.20 successfully on my RH 7.2 box. Now I try to install MySql 4.01 (after removing MySql 3.23.49) I get a Php-mysql.4.xx requires libmysqlclient.so.10. My attempt to install MySql 4.01 ends there. I did some reading and found that

Please Help! MySql 4.01/PhP 4.06 looking for Libmysqlclient.so.10?

I have installed MySql 3.23.49, PHP 4.06, and Apache 1.3.20 successfully on my RH 7.2 box. Now I try to install MySql 4.01 (after removing MySql 3.23.49) I get a Php-mysql.4.xx requires libmysqlclient.so.10. My attempt to install MySql 4.01 ends there. I did some reading and found that