You only need is to use Blizzmagic to load a kickstart rom 3.1, but you are better of to buy those kickstart 3.1 roms.
Blizzmagic is for Blizzard 1230/1240/1260, not Cyberstorm.
BlizKick might work, depending on the Cyberstorm version.
If you use a softkick rom, you lose 1 MB of RAM to use OS 3.9. OS 3.9 needs also to softkick some functions.
You lose 512KB + few hundred kilobytes. Totally Insignificant with 140 megs of ram.
