First thing you should of done was to just use a flash drive (Roughly 1-5GB) to install TinyCore incase you run into problems along the way you could just reformat it and start over again. I got the ATI RADEON HD 5850 and i've been using xf86-video-ati.tcz, but you'd have to go into console (CTRL+ALT+[BACKSPACE or F1-F3]) to install it for OnBoot, so you can't use the App Browser while you are in TinyCore. The command should be something like this... tce-load -wi xf86-video-ati.tcz and it will automatically have the drivers load everytime you start your computer. That is a fairly new card and i hope this works out for you, good luck.