Script Affect Other Scripts

[AlexC]

So I use one hosting account for all my sites and stuff because that's what I've got. I've been trying to install other scripts in sub-directories, but it won't let me access them to even install stuff! I keep getting that message "Fatal Error: Class BpController either does not exist, or has its include path misconfigured!".

I understand how it is useful for some stuff, but it is kinda of annoying that it effects /everything/. I can't even access the folders I store my images in, I have to type out every single (very long) url to access an image to put onto the site.

Is there anything I can do about this? Maybe limit this new url thing to only certain folders?