As an update on this topic and fyi, I have managed to get VirtualBox 1.4.0 running under 5.8 SOHO.
After hours of frustration trying everything in the book, loading libs, etc, I downloaded the .run version
and instead of ./ VirtualBox-Linux-1.4.0.run install /opt/innotek/VirtualBox as the instuctions say I prefaced the line with perl minus the ./
and lo and behold it installed itself as described in the manual. It's like;ly all my other efforts had installed the
right dependencies, and the moon was in the right phase, but it worked for me.
Now I have to deal with a whole new set of problems getting the programmes I want to work in their guest system,
but that's another story.
If this helps anyone pass it on.