Lots of strange names, al about cameras and photography this time.
ARW is the file extension given to RAW files from my A100 Sony camera. On windows I was using a free image editor called Gimp and seeing as it came bundled with my Fedora 8 installation it seemed sensible to continue using it on Linux.
I was using a program called UFRaw to read the ARW(RAW) files and import them into gimp, but this wasn't included in the distro so need to retrieve it.
# yum whatprovides ufraw
Produced no results, turns out the freshmeat rpm repository wasn't working, so add enabled=0 to the appropriate file (/etc/yum.repos.d/freshrpms.repo) and try again. This time yum picked up ufraw so it was to be a painless install.
Checked with fedoraforum.org and it seems there would be a couple more packages I needed....
So, one yum install later (as root)...
# yum install ufraw ufraw-common ufraw-gimp
...and now when I double click an ARW file, Gimp attempts to open it succesfully (well, actually the UFraw Gimp plugin opens it, but who cares - it works :) ).