how do I install packages ?

Hello, I think i finally installed pear, because I got an ok, message, but it was followed by some warning messages: _________________________________ install ok: PEAR 1.0.1 install ok: Archive_Tar 1.0 install ok: Console_Getopt 1.0 Warning: unlink() [http://www.php.net/function.unlink]: No such file or director y in C:\WINDOWS\TEMP\gop3110.TMP\System.php on line 357 Warning: mkdir() [http://www.php.net/function.mkdir]: File exists in C:\WINDOWS\ TEMP\gop3110.TMP\System.php on line 358 Warning: Unable to create temporary directory C:\\WINDOWS\\TEMP in C:\WINDOWS\TE MP\gop3110.TMP\System.php on line 82 Warning: readdir(): supplied argument is not a valid Directory resource in C:\WI NDOWS\TEMP\gop3110.TMP\PEAR\Installer.php on line 565 warning : you are using an archive with an old format no package.xml file after extracting the archive _______________________________________ I don't know how to install and use the pear packages, could you help me ? Thanx, Stefan