Suite Issues after 4.02 Install

[محروم.كوم]

I followed all instructions and made a backup db and site in subfolder of my main live site. I upgraded from 3.8.1 to 3.8.4 then to 4.02 Suite and eveything seemed to go smooth.


A couple of things I need help on:

1. There was an error that kept telling me that the install.php file was still in the /Install directory when it wasn't there from the beginning. I was only able to get past this by renaming the install directory completely then clicking "go back". Why is that?
2. Now that I am in my sites AdminCP I can do everyhing but when I click on "Forum Home Page in the top right corner, I get a totally messed up webpage. I searched this forum and found where Trevor suggested (for a totally different problem) "Have you deleted all your previous styles from AdminCP > Styles & Templates > Style Manager?" I figured that might be my issue too since I just upraged, but in AdminCP > Styles & Templates > Style Manager I only see "vB4 Default Style and Default Style (vB3 Style - Incompatible)?
3. Where do I delete the previous styles from and how will I know which are old and which belong to vB4
4. How do I get past this issue if it is is not the Styles or Templates?

Thanks in advance. __DEFINE_LIKE_SHARE__