I'm trying to boot Slitaz from liveCD on my Sony Vaio PCG-FX109K (Pentium lll 850 MHz and 512 RAM).  Other Linux distros I have tried need acpi=off at boot on this machine and a change in screen resolution.  When I press F5, then F6 I get the boot options, but if I then type the following at the boot prompt:
vga=775 acpi=off

or I type:
vga=775 slitaz acpi=off

I get an error message:
Could not find kernel image: vga=775

If I let the boot sequence run I get lots of lines of boot activity up to a line:
bio: create slab bio-0. at 0
then the flashing cursor and all activity ceases. 

How can I fix this, please?

Edit 1:  OK - so I forgot to put slitaz in front of vga=775!
But I have another problem that I will ask about in another post.