請問Adobe CS4 有分 64-bit 或 32-bit 的版本嗎，還是安裝時選擇

安裝Adobe CS4 於Vista 64-bit, Photoshop 的System Info下卻顯示Vista 32-bit

以下為photoshop 的system info 片段

Adobe Photoshop Version: 11.0 (11.0x20080121 [20080121.m.254 2008/01/21:02:00:00 cutoff; m branch])
Operating System: Windows Vista 32-bit
Version: 6.0 Service Pack 1
System architecture: Intel CPU Family:6, Model:7, Stepping:6 with MMX, SSE Integer, SSE FP, SSE2
Physical processor count: 2
Processor speed: 2533 MHz
Video Card Vendor: Intel
Video Card Renderer: Intel Bear Lake B
OpenGL Drawing: Disabled.
Video Card: Intel(R) G33/G31 Express Chipset Family
Video Mode: 1680 x 1050 x 4294967296 colors
Video Card Driver: igdumd64.dll
Driver Version: 1680 x 1050 x 4294967296 colors
Built-in memory: 4085 MB
Free memory: 3043 MB
Memory available to Photoshop: 3255 MB
Memory used by Photoshop: 55 %
Image cache levels: 6