Well, I've just found out you can do a neat trick. Some RAMDISK software is capable of initiating its own kernal memory management in XP 32bit (not all do this), and uses that wasted 1GB for - an Amiga style RAMDISK!!!
I've not tried it yet, but there are free and commercial solutions. Here are a couple I found:
http://www.knowledgesutra.com/forums...-in-xp-32bits/
http://www.jensscheffler.de/using-ga...k-in-windows-7
http://www.superspeed.com/desktop/ramdisk.php (read about "extended memory access)
The idea of a 1GB RAMDISK in XP 32-bit on a machine with 4GB RAM sounds awesome. Imagine what you can use it for - temp folder, cache folder, various XP shell folders (like those containing index.dat files), SWAP file (kind of pointless) - but at least it gets used for something. There may be a small performance hit from using PAE feature in XP 32bit, but it will be very small and nothing really on a dual core or above CPU.
May not work, but I'll try it out soon and if anyone else gets a chance or is interested post back here.
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