Help With Installing FreePBX

Thanks to the help of twinclouds and some other members here I successfully installed asterisk-1.8.9.2. I would like to get FreePBX up and running but have no idea how. The only guide I found online is the the script from corenetworks available here, but it installs asterisk for you and I already have asterisk installed. I believe that other things need to be fixed like the asterisk download locations but I'm not sure about that. I certainly don't have the knowledge to start messing around with the script.
I would appreciate if any on can point me in the right direction.
Thanks

http://forums.plugpbx.org/index.php/topic,110.0.html

I tried using the script from the above link, but in the middle I got the following errors
+----------------------------------------------------------------+
+----------------------------------------------------------------+
| MySQL |
+----------------------------------------------------------------+
Press <enter> to continue
MySQL root password:
Create call records database (MYSQL root password please, 1 of 4)
./freepbx.sh: line 135: mysql: command not found
Create Asterisk database (MYSQL root password please, 2 of 4)
./freepbx.sh: line 137: mysql: command not found
Create call datbase user (MYSQL root password please, 3 of 4)
./freepbx.sh: line 139: mysql: command not found
Create Asterisk database user (MYSQL root password please, 4 of 4)
./freepbx.sh: line 141: mysql: command not found
./freepbx.sh: line 143: mysql: command not found
./freepbx.sh: line 144: mysql: command not found
+----------------------------------------------------------------+
| Configuring Asterisk to use FreePBX |
+----------------------------------------------------------------+
Press <enter> to continue.

I could use some help. Thanks

I think it is better to ask for help in the plugpbx forum.

Thanks, will do.