This is how I got it working on Vista. (Kalypso DVD version)
Installed patch.
Installed JSH mod.
Right click on Shortcut...
choose 'Customise'..
click 'Edit'
click 'Compatability' (3rd along top)
check the box for run in compatability mode 'xp service pack 2'
check the box 'run as adminitstrator'
apply.
...
works for me everytime
good luck