Beginning with version 1.0.2.006 there is a new feature which basically marks some/all the memory used by GPO for samples as non pageable. Although overall GPO performance is better, load times are slower for some PC users. You can disable this behavior by setting the registry/preferences key "disableMemoryPaging" to 0. If you are experiencing this we can send you a reg file fix. The user will have the option of activating/deactivating this in the next update of the Player.

(from garritan.com)