I am new to this group, so I apologize in advance if I am asking a redundant
question. I looked, but didn’t see the answer anywhere.

I understand that a 32 bit operating system can only see 4 gb of RAM.
Windows XP had a switch you could turn on in the boot.ini file that allowed
you to use 3 gb RAM to a single program. I am a photographer and utilize
Adobe PhotoShop (a huge RAM slut) and after moving from XP to Vista I find
that I effectively went from 3 BG of available RAM in PhotoShop to about 1.7
BG of RAM – creating a huge speed difference. Does Vista have a way to
recreate this 3 GB switch?