[Newbies] Version Control and new VMs

Hi,

I started to play recently with Squeak and Smalltalk. My impression is the Squeak and the Seaside Framework are moving targets, very exciting pieces of code, but if I start a project this week, in the next week will be available a new VM, or a new image, a new Seaside version, etc...

Very good, because it means a very productive and creative community. But if I have a project, and want to migrate to a new image version? or to a new Seaside version? What is the right/easy way of doing this? Change sets?

Maybe my question is how to do version control and manage conflicts? How to migrate to new images?

Thanks, Fabio