My understanding is the 64-bit operating system should run any 32-bit programs with no trouble. A 32-bit system will not run 64-bit specific programs (of which there are very few). Everest not being any help may because your system is new, or perhaps there is not a specific Vista version of Everest. Try other software to identify components such as Aida32 and belarc advisor. All good, but vary in their coverage - these guys are amateurs, dont forget, they have not got sheds-full of modern PCs.
Since you know the product id there should be no real problem getting the drivers, as long as Acer ever did support XP 64. They might not have done, in which case you can go to the motherboard manufacturers site for chipset drivers (wont be Acer !), and similar for other peripherals. I advised a gent a week ago to try drivers for a slightly earlier model of his laptop on XP (downgrade for same reasons as you !), and they worked superbly, he says.
Oddly, the Acer support is down as I try.....