I'm unfamiliar with Mosix, but few programs are so finicky that they work with precisely one
kernel version. The page to which you link mentions "Kernel-3.3" and it does not
explicitly state that it's not compatible with 3.3.1. Thus, I recommend you just try it with 3.3.1, unless you can find something that specifies you really need 3.3.0 and not 3.3.1. If 3.3.1 fails, you can get a 3.3.0 kernel and compile it yourself. You might also be able to get a precompiled 3.3.0 for Fedora; they were
in the repositories a while back, although I gather they've been replaced by 3.3.1 builds. I'm not sure if older versions of software that has been upgraded are kept in repositories.