install mysql and mysqli together

Hi, i would like to install the standard mysql extension together with the new mysqli extension. the documentation say, that in this case the bundled libmysql libary in PHP cannot be used. furthermore it recommended to use the client libaries installed by MySQL below Version 4.1 in /usr/mysql reside the MySQL 4.0.14 and in /usr/local/mysql it reside the latest MySQL 4.1 Snapshot. actually I try this way: ./configure --with-mysql=/usr/mysql/lib/mysql/lib --with-mysqli=/usr/local/mysql/bin/mysql_config with the following result: configure: error: Cannot find MySQL header files under /install/mysql/lib/mysql/lib. Note that the MySQL client library is not bundled anymore. okay, the php client libary libmysql cannot be used anymore, but how can I install both mysql extension together in my specific case? I would be happy if anybody could help me! best regards Jürgen Mueller