Since RIM still
has not introduced 64-bit Device drivers, I had to figure out a work around. It may not be simple but it works! If you are not techinically savvy, I would recommend getting help. The software needed is free but you do need a working copy of Windows 2000 or XP.
First, I completely shared the folder that contains my Outlook .pst file. I assigned a TOUGH
password to it since I am on a network (another option would be to share the folder only when you perform the sync).
VMWare allows you to create a virtual computer that runs on your physical computer. VMWare Server Console (type 'vmware server' in google for the link) is a free download and extremely powerful and stable. After installing it on my Windows XP 64 computer, I created a New Virtual Machine with a 4GB hard drive, 256MB RAM (my PC has 1GB), and all the other default settings. Be sure to install the USB support. On this virtual machine, I installed Windows 2000, Office 2003, and the RIM software. Do not set up email accounts in the 'virtual' Outlook...we only want it to sync! When completed, I burned all the VMWare files to a DVD-R in case of emergency backup (this is a personal preference).
Your virtual computer is listed as a separate computer in the network and should be able to transfer files to and from the host computer. I pointed the virtual Outlook to look at the .pst file on the XP64 PC, set up the RIM software and BAM! I'm synced.
It's a pain to set up at first which is why I make the emergency backup. If it goes bad for whatever reason, I don't want to have to start from scratch (took me four hours but I also ran all Windows Updates and hit a few obsticles). But now, it takes less than five minutes to shut down Outlook, launch VMWare and virtual Outlook, run the sync, and shut down VMWare. No separate computers, no dual booting, no having separate .pst files, etc.
One key thing to remember is only run one Outlook at a time. I don't know if anything would happen if you accidentally ran both at the same time, but I don't want to find out.
I hope this works for you...good luck!