Yes, you can download many extensions on the same command line.
If you are already in the gui, do not load the graphics-KERNEL extension.
In the gui: $ tce-load -wil Xorg-7.7 xf86-video-ati firmware-radeon flwm wbar aterm
Next, exit to the console prompt, then: $ tce-load -wil graphics-KERNEL
$ startx
Note that while you are still experimenting, it would be much easier to install CorePure64 to a usb stick and boot from that.