I finally got this to work, so I will post my findings here.
//PHP 5 : Windows build needs a MySQL DLL
//PHP 5.0 doesn't come with mysql support... You have to get the librariesyourself...
//I think u can get them from mysql.com
// PHP 5 Beta 2
//The file php_mysql.dll comes with these snapshots, as well as a new version of libmySQL.dll,
//so I suggest a full upgrade to Beta 2 instead of just extracting php_mysql.dll for use with Beta 1.
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到 www.jetdown.com 下载下面三种软件,做好安装准备
apache_2.0.47-win32-x86-no_ssl.msi
mysql-4.0.14-win.zip
phpMyAdmin-2.5.3-rc1-php.zip
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PHP 5 Beta 2 http://snaps.php.net/win32/php5-win32-latest.zip size：5.87 MB (6,162,835 bytes)
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<1>安装配置PHP
1.解压缩PHP压缩包到C:php
2.复制C:php目录下的php4ts.dll及C:phpdlls目录下的所有文件到windows安装目录的系统文件夹里
(win9x/me是system目录，winNT,2k/winXP,2003是system32目录)
复制C:phpphp.ini-dist到windows安装目录下（如：c:windows），并将其改名为php.ini。用记事本打开，修改一下信息：
搜索extension_dir = ./ 这行，并将其路径指到你的PHP目录下的extensions目录，比如：
extension_dir = C:phpextensions
如若想支持更多模块，，搜索：
;Windows Extensions
;Note that MySQL and ODBC support is now built in, so no dll is needed for it.
下面都用分号在前面注释掉了支持的扩展模块，如果你想PHP支持某个模块，请将前面的“;”去掉即可
修改完成后,保存php.ini，到此完成PHP的安装和配置。
我们在下面加入一行
extension=php_mysql.dll
//Note 1: The extension dir need not be ".", as Hermawan mentioned. It works fine for me with the extensions subdir where the other extensions are located.
//Note 2: The php.ini file need not be in the Apache root, as lars mentioned. It works fine for me in the Windows dir.
<2>安装Apach2
1.备份 C:Program FilesApache GroupApache2confhttpd.conf 文件。
2.用记事本打开C:Program FilesApache GroupApache2confhttpd.conf
找到：
#NameVirtualHost *
修改为：
NameVirtualHost 127.0.0.1 //或localhost
找到：
<VirtualHost 127.0.0.1>
修改下面几行：
ServerAdmin (你刚才安装时候输入的管理员信箱)
DocumentRoot C:Program FilesApache GroupApache2htdocs
ServerName Apache2
ErrorLog C:Program FilesApache GroupApache2logserror_log
CustomLog C:Program FilesApache GroupApache2logsaccess_log common
</VirtualHost>
找到：
AddType application/x-tar .tgz
在下面添加以下两行：
AddType application/x-httpd-php .php
AddType image/x-icon .ico
找到：
#LoadModule ssl_module modules/mod_ssl.so
在下面添加一行：
LoadModule php5_module C:phpsapiphp4apache2.dll //这里php5_module是关键，如果php4_module apache就无法启动了
增加默认文件：
找到DirectoryIndex * 这行，可以这样修改，添加默认的文件名：
DirectoryIndex index.php default.php index.htm index.html default.htm default.html
保存文件，重起apache服务器。
最后，在该文件末尾加上下面两行
ScriptAlias /php/ "c:/php/"
Action application/x-httpd-php "/php/php.exe“
到此Apache的PHP环境已经完全建立了。
<3>测试：
用记事本新建个文件，写下下面几行，保存到C:Program FilesApache GroupApache2htdocs目录下，这个目录就是你的站点跟目录，命名为phpinfo.php.然后在浏览器中输入http://localhost/phpinfo.php 就可以看到想尽的关于PHP的信息了。
phpinfo.php代码如下：
<?php
phpinfo();
?>
<4>安装mysql
1.按默认安装在C:mysql
Copy the following files to the Apache modules directory:
phpphp4ts.dll
phpsapiphp4apache2.dll
phpdllsiconv.dll
If any of these files are missing in the modules directory, Apache will fail to start.
Be sure the extension can find the following files:
php_mysql.dll
iconv.dll
libmySQL.dll
If any of them can't be found, Apache will start but will issue a warning like this: "Unknown(): Unable to load dynamic library 'cphpextensionsphp_mysql.dll" - The specified module could not be found."
php_mysql.dll should be in the extensions directory.
iconv.dll should be in the Apache modules directory.
libmySQL.dll must be either in the Apache root directory or the Windows system directory. I prefer the former because it's cleaner, as other applications don't necessarily use this MySQL library version.
Note 3: Be sure to use the libmySQL.dll file bundled with PHP. In my case, trying to use the libmySQL.dll from the MySQL 4.1 alpha package resulted in this error message: "Unknown(): Unable to load dynamic library 'c:phpextensionsphp_mysql.dll" - The specified procedure could not be found."
Start Apache and everything should be fine.
2.运行C:mysqlbinwinmysqladmin.exe 设定user 和password
3.运行mysql,测试一下
mysql> show databases;
+-----------+
| Databases |
+-----------+
| mysql |
| test |
+-----------+
如果出现以上画面，表明mysql已经安装成功；
2.更改MySQL系統之管理者密碼(新密碼的地方，換成您要設定的密碼)
mysql> UPDATE user SET password=password('新密碼') where user='root';
3.编辑php5中的启动文件php.ini,将mysql和php5连接起来.
mysql.default_port=
mysql.default_host=
mysql.default_user=
mysql.default_password=
改为：
mysql.default_port=3306 说明的是mysql的缺省端口一般为3306
mysql.default_host=localhost 说明的是mysql的缺省主机名称
mysql.default_user=jinchao 说明的是mysql的缺省的用户名(root是最高级用户)
mysql.default_password=666666 设置管理员的口令
修改完后将apache重启,查看phpinfo页面.
<5>安装phpmyadmin
修改 C:Program FilesApache GroupApache2htdocsphpMyAdminconfig.inc.php
查找以下这么一段：
$i = 0;
// The $cfg['Servers'] array starts with $cfg['Servers'][1]. Do not use $cfg['Servers'][0].
// You can disable a server config entry by setting host to ''.
在这段之后再继续查找：
找到 $cfg['Servers'][$i]['auth_type'] = 'cookie'; 將 『 config 』改為 『 cookie 』或 『 http 』
找到$cfg['Servers'][$i]['host'] = 'localhost'; 视情况做相应修改
找到$cfg['Servers'][$i]['user'] = 'root'; 视情况做相应修改
找到$cfg['Servers'][$i]['password'] = ''; 视情况做相应修改
找到$cfg['Servers'][$i]['port'] = '3306'; 视情况做相应修改
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