Take this issue to the microsoft.public.windows.64bit.general newsgroup
since it sounds more like a 64bit issue than an XP issue.
"Ronis" <(E-Mail Removed)> wrote in message
news

A78DD7D-0702-4D07-9E07-(E-Mail Removed)...
>I have XP Pro x64 on a quad core proc. When I am playing everquest, I
>notice
> on the Task Manager that the different everquest sessions are being
> rotated
> to different cores, and occasionally, they ALL end up on the SAME core,
> resulting in everything freezing.
>
> Ive tried to manually set affinity via the task manager but its not
> allowed.
> Im using wineq2 and have the innate eq affinity setting to off.
>
> Im told by tech support its an XP issue not Everquest or WinEQ2. So my
> question is, how do I STOP the OS from rotating my multiple instances of
> the
> same game around and force them onto discrete cores?