Hi,
just finished episod one. Was great although too short (waiting for the other episods to come soon !).
Had it work reasonably well under this configuration :
Fedora 11(leonidas) kernel 2.6.30.10.105.2.23.fc11.i686.PAE with VirtualBox 3.2.26 hosting a windows 2000 (tried on a windows7 evaluation version but load is too heavy for my poor computer !). 3D activated (and working!), 500Mo RAM allocated and 128Mo for video RAM. sounds sometimes hang but nevermind...
holy s*** dude! just run it on wine. flawless, fast and easier.