Description of problem: 1) A single grub config for F8 can be used for both an i386 and an x86_64 install on the same machine, but both installs write conflicting kernel info in shared config when the kernel is upgraded, becaus of the same image naming. As to why both a i386 and a x86_64 are installed: te investigate game issues on x86_64 for 32bit games - Return to Castle Wolfenstein has an issue for example. 2) Potential future use: run a 32bit F8 install on a x86_64 kernel as an option. during boot the user may choose the 32bit kernel or the 64bit kernel. This may help to intensify the x86_64 kernel use. Agreed: modutils needs to be changed for this. 3) livna provides nvidia kernel modules for i586, which forces me to use a i586 kernel though I would like to keep my i686 kernel as well. This however is not possible. This suggestion may have been posted and/or discussed before, but I wasn't able to find it.
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Fedora 9 surprisingly has my requested feature. So the request is now opsolete.