http://bugs.winehq.org/show_bug.cgi?id=5347
------- Additional Comments From dmitry@codeweavers.com 2007-07-08 03:17 ------- I spent a lot of time investigating this problem.
The slowdown is not due to missing registry keys, but inefficiency in desktop folder implementation of builtin shell32. Using native shell32.dll from a win2k box considerably reduces start up times of Photoshop.