How do I run the Gene Construction Kit under Linux?

There are only a few Mac or Windows programs that don't have a good equivalent on Linux. One of these few is the Gene Construction Kit (GCK) from Textco. GCK is available for both Windows and Mac. So it should be possible to run it on an i86-Linux machine using wine (a sort of emulator). I tried that and failed (I didn't try really hard). However, probably any Windows program can be run under Linux using VMware. Unfortunately VMware is commerical and expensive (but there is a fully functional time-limited demo).

Hot-swapping different user GUIs under Linux

I read that Windows XP has a "new" feature that lets users hot-swap their desktops. Instead of logging out, a user can put his session into the background and another user can log in. This is of course very useful if you are downloading large files or running services and you don't want to interrupt the process. If figured out that Linux is able to do the same already for years: