In a few weeks/month I am going to get rid of the computer that is presently running a sulphur model (and has a long way to go). Is it possible to transfer the project to my new machine at that time, so that all that crunching is not wasted?

Yes. I suggest zipping up the entire BOINC folder and burning it to CD/DVD (probably DVD given the size of the sulphur model), then extracting it to the folder location on the new PC. Or copying it across the network if both PCs will be online at the same time. Then reinstalling BOINC (the same version would be safest) on the new PC to the location you extracted the BOINC folder.

Yes. I suggest zipping up the entire BOINC folder and burning it to CD/DVD (probably DVD given the size of the sulphur model), then extracting it to the folder location on the new PC. Or copying it across the network if both PCs will be online at the same time. Then reinstalling BOINC (the same version would be safest) on the new PC to the location you extracted the BOINC folder.

(I forgot to say that both machines are running Mac OS X, and I will be able to connect them over a network or firewire cable before I dispose of the old one.) So what you are saying is that I just install BOINC on the new machine, and then copy the BOINC folder from the old to new machine, and then the crunching just continues on the new machine without a hiccup?

So what you are saying is that I just install BOINC on the new machine, and then copy the BOINC folder from the old to new machine, and then the crunching just continues on the new machine without a hiccup?

Assuming it is very much like Linux, yes.

(I forgot to say that both machines are running Mac OS X, and I will be able to connect them over a network or firewire cable before I dispose of the old one.)

Follow-up: When I started up the new Mac for the first time, it asked me if I had stuff on an existing Mac that I wanted to migrate across, and then asked me to connect the two machines by Firewire and transferred everything across, including apps, accounts, prefs, histories, bookmarks, address books... (nice). The point is that I didn\'t have to do anything and the BOINC project started up on the new machine where it left off on the old one. One thing I thought was then important to do was to close down BOINC on the old machine straight away when I started up, and delete it all, WITHOUT aborting or detacting from the project on the old machine, because that would have affected the ongoing simulation on the new machine.

Hope that helps others facing with this situation.