arrays larger than ARRAY-TOTAL-SIZE-LIMIT

I'm developing a 3D cellular explorer, with realtime OpenGL support and DXF
export, see for example this Game of Life pattern, rendered with a 3D
program from exported DXF data:

http://www.frank-buss.de/tmp/ca-explorer.jpg

For larger simulations I need larger arrays. What's the best way to do this
in Lispworks? And how can I do it compatible with Common Lisp, while still
fast in Lispworks? Are there any advantages using 4.4.5 instead of 4.3 for
such tasks?

-- 
Frank Buß, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de