Fortunately, Apachefriends project provides a development package so that I can take advantage of it to re-compile the PHP. My Linux version is CentOS 4.5 final, all the steps are pretty straightforward:

1) Download latest apachefriends packages (both working package and development package) and install them.
2) Download PHP 5.2.5 and untar it
3) yum install pspell-devel
4) Download libbz2 and install it
5) Hack the PHP configuration
    
   This is the original apachefriends’s php configuration

./configure –prefix=/opt/lampp –with-apxs2=/opt/lampp/bin/apxs –with-config-file-path=/opt/lampp/etc –with-mysql=/opt/lampp –enable-inline-optimization –disable-debug –enable-bcmath –enable-calendar –enable-ctype –enable-dbase –enable-discard-path –enable-exif –enable-filepro –enable-force-cgi-redirect –enable-ftp –enable-gd-imgstrttf –enable-gd-native-ttf –with-ttf –enable-magic-quotes –enable-memory-limit –enable-shmop –enable-sigchild –enable-sysvsem –enable-sysvshm –enable-track-vars –enable-trans-sid –enable-wddx –enable-yp –with-ftp –with-gdbm=/opt/lampp –with-jpeg-dir=/opt/lampp –with-png-dir=/opt/lampp –with-freetype-dir=/opt/lampp –without-xpm –with-zlib=yes –with-zlib-dir=/opt/lampp –with-openssl=/opt/lampp –with-expat-dir=/opt/lampp –enable-xslt=/opt/lampp –with-xsl=/opt/lampp –with-dom=/opt/lampp –with-ldap=/opt/lampp –with-ncurses=/opt/lampp –with-gd –with-imap-dir=/opt/lampp –with-imap-ssl –with-imap=/opt/lampp –with-gettext=/opt/lampp –with-mssql=/opt/lampp –with-sybase=/opt/lampp –with-interbase=shared,/opt/interbase –with-mysql-sock=/opt/lampp/var/mysql/mysql.sock –with-oci8=shared,instantclient,/opt/lampp/lib/instantclient –with-mcrypt=/opt/lampp –with-mhash=/opt/lampp –enable-sockets –enable-mbstring=all –with-curl=/opt/lampp –enable-mbregex –enable-zend-multibyte –enable-exif –with-bz2=/opt/lampp –with-sqlite=shared,/opt/lampp –with-libxml-dir=/opt/lampp –enable-soap –enable-pcntl –with-mysqli=/opt/lampp/bin/mysql_config –with-mime-magic –with-pgsql=shared,/opt/lampp/postgresql –with-iconv –enable-dio –with-pdo-mysql=/opt/lampp –with-pdo-pgsql=/opt/lampp/postgresql –with-pdo-sqlite –with-ming=shared,/opt/lampp

Because we only use MySQL , so I remove other database support from it such as:

–with-pdo-pgsql=/opt/lampp/postgresql
–with-pgsql=shared,/opt/lampp/postgresql
–with-oci8=shared,instantclient,/opt/lampp/lib/instantclient
–with-interbase=shared,/opt/interbase

Of course, in order to support Pspell extension, add this at the end

–with-pspell=/usr

6) re-compile the php

Done!