CLI problem

I've tried, a number of times over the past year, to update pear. He's what I have. I'm running Apache 2 and PHP 4.3.4. I'm running this on an iMac and I used the Apache2/PHP/MySQL installer provided at serverlogistics.com. Apache installed and runs great. PHP installed and runs great, as does MySQL. Now, PEAR is installed but need to be updated. I found the pear CLI shell script in /Library/PHP4/bin/ I run the following command from inside that directory so I can get the new PEAR base files: ./pear install PEAR and I get the following error. Could not get contents of package "/Library/PHP4/bin/PEAR". Invalid tgz file. Now the PEAR files are located in /Library/PHP4/lib/php Anyway I can get this going? Thanks a million. Eric Stewart