To find the file you want, look at whether the file name says x86 or
x86 is the 32bit version, x86_64 is the 64bit version
If a build exists with the name x86_64core2 it means it has been compiled for Core2 and newer intel processors - don't complain if it doesn't work for you.
(may work on some others, my Pentium D uses this flag when gcc is given --march=native)
Any others are generic and are not specific to any CPU.
Patches have been applied to add icons and Vista/7 Users manifests for some programs, and to make mythfrontend not open up a console - it WILL still take some time to start up, so be patient!
These builds should work all all processors, if they don't report a bug to me here on sf.