so I redownloaded Vbulletin and installed it, but instead of choosing the .php files, I downloaded the .php4 files. Is this an issue for hacks/mods that I install? should I just go and download the .php files instead of .php4?? I asked my host what php was running for him and he said 4, so I went with that. thoughts?

You should redownload. It's not a good idea to run nonstandard extensions. Especially since you will need to re-configure your server settings to actually recognize the .php4 extension.

That is most likely there for folks that are running two php versions.

I have php 4 i use .php no problems..

Of course you do, that is what it is supposed to be. ;)

The .php4 is just something they made up for people that run two versions of php and have their server specially set up to distinguish between php 4 and 5 scripts according to extension.

That would be why

ok, thanks codemonkey.