If you are using Gmail as your mail aggregator and want to set it up in Outlook 2010, you can follow the usual steps:
Unfortunately, if you want to separate your OS from your Data partitions or drive, you will want to move the location of the imap pst created by default under: C:\Users\[user name]\AppData\Local\Microsoft\Outlook
Moving the PST is unfortunately not as straight forward as you would expect (like a browse path or select button), even in version 2010.
Links:
[1] http://pulse.veltsos.com/category/it/email
[2] http://pulse.veltsos.com/category/it/it-general
[3] http://pulse.veltsos.com/category/it/software/software/os/microsoft
[4] http://pulse.veltsos.com/category/it/tweaks
[5] http://linux.philosweb.com/drupal/system/files/image_2_138.png
[6] http://linux.philosweb.com/drupal/system/files/image_4_49.png
[7] http://mail.google.com/support/bin/answer.py?answer=77689
[8] http://linux.philosweb.com/drupal/system/files/SNAGHTML188ea61e.png