RE: Install page not working ?
 

You probably entered in the wrong database details when installing the script. Please re-install and make sure that your database details are correct.

It may also be a host issue as that error can sometimes mean that the SQL server is down on your host, so if the installer completed successfully with the database details you gave it then it may be the MySQL server is down. If you have CPanel you can go into your CPanel and view the Service Status or System Status link (something like that) and it should tell you if MySQL is up or down. If it's down, that's the issue.

RE: Install page not working ?
 

The database is up, I re-entered different details which I'm pretty sure are correct (I was using the wrong host/server), but now I'm getting this problem:

RE: Install page not working ?
 

That error means the details were incorrect. :(

It's attempting to connect but something is incorrect in the info you entered.

RE: Install page not working ?
 

Alright, that'll help :D

Haha, thankss.[hr]
Good news ! I figured it out, and I have it working. It says,

Before I do something I may regret, let me just be clear:

I delete the WHOLE file, 'install', & all the components in it ? That won't affect the site?

And thanks so much for all your support :)