I have still issues with mkisofs, but before talking about this, I would really express all my gratitude to Martin Hansson, who has just fixed YAFS for AROS. So we can finally use FileZilla or any other graphical FTP client to transfer files from/to VmwAROS!
And now the mkisofs issue: I explain what's blocking me from releasing VmwAROS Live! in this Aros-exec.org topic. If someone know how to fix this, please send me an email to paolo()vmwaros.org or post an answer there. =)