Multi-boot has been around for quite some time now, and is something we would like to see more of. Multi-booting can have a number of fun and even functional uses, such as having a ROM for gaming and a ROM for business, or even using one ROM for your secret family and one ROM for your real family so you don’t get mixed up. In any case, multi-booting is here and for users of the Motorola Defy, it’s only getting easier.
XDA Senior Member royale1223 has released a version of an application called MultiBoot for the Defy, which allows users not only to boot into multiple installments of Android, but provides an easy to use management GUI that helps users keep track of what’s what.
While the program is extremely helpful, it is not all fun and games when using it for the first time. The developer takes users through the steps of using it, including creating Ext3 data files, and then using the Multi Boot Manager application to install various iterations of Android. As this is a work in progress (albeit a relatively stable one), there are still some bugs and some things that may not work quite right just yet. With that in mind, the developer urges users to make a full backup, both Nandroid and full SD card backups before using.
You can find additional information, the full instructions, screen shots, explanations and a very nice thank-you list in the development thread.