The question says it all..

Thanks a lot in advance

I think the latest version of thr MAC DM lets you do those type updates. Otherwise, find a friend with a PC and do it the "old fashioned way:".

If you have a copy of Windows handy, 2000 perhaps, install it as a virtual machine in something like Sun's Virtual Box. Keep it around for those odd things that can't be done yet, or easily, on OS X.