I have just installed Fedora 8 64bit. I've got some questions.

Question 1.
When Fedora first booted, it prompted me for a username and password...I didnt have a username (of course since it was freshly installed), but I did have a password (the root password you choose during install). I thought I had missed something vital during the install so I...*ashamed*...reinstalled. Anyhow, I finally understood that you had to enter root as username and the root-password as password.
Now, how is one supposed to know that? I was just lucky when I typed 'root' in there.. And also, should I keep signing in as root or what should be my next move? I reckon I should create a new user and sign in with it instead?

Question 2.
I need to update my graphics card. I have an ATI Sapphire Radeon x1950 Pro.
There are 64 bit linux drivers available at ATI, but when I download it, all I get is some file which extension is .run that cant be opened. When I double-click it, this is what I get: (translated from swedish as good as I can)
Gedit couldnt identify the character coding.
Make sure you aren't trying to open a binary file.
Choose a character coding from the menu and try again.
Character coding: *Drop-down menu of character codings here.

How does one go about installing drivers like these?

Thanks.