Slitaz rolling needs a 'vga=792' on the edited command line in order to run in graphics mode when starting on a DVD. Not all choices for startup actually work at all, so you need to try one or two until you get the graphics environment with the pcmanfm desktop.
I found two major problems with my installation attempts on a Compulab gma500 fit-pc2:
1. The poulsbo.ko.xz module crashes any psb_gfx installation. Solution is to uninstall poulsbo before getting the psb module for the vmlinuz-slitaz staging directory. After that, you can simplify matters in slitaz by uninstalling the vesa_drv.so graphics driver and leaving or re-installing fbdev_drv.so.
2. The soundconf program freezes on a gma platform. Solution is to copy 'alsaconf' into the /usr/sbin/soundconf directory and move alsaconf to soundconf. In other words, the slackware alsaconf script replaces soundconf, which freezes. After this, you can hear the sound chip click on when you start up slitaz, and things go forward relatively smoothly.
"Relatively smoothly": The wifi loses the wpa password between startups, so you need to give it the password each Time to get the wifi running. If you really want a thrill, get mesa from the tazpkg library, and then swrast works to provide dri for the fbdev driver. You can get the mesa examples and prove to yourself that glxgears and glxheads work.