Since this was brought up in a totally different thread here - it reminded me of having looked into it before...I do love this sort of stuff !!

I cannot link to that exact reply that I know of, but credit goes to Anixx for the helpful reminder - Thanks !!:

Quote
Anixx
To make 32-bit XP to use all RAM (increase RAM limit) one has to patch one byte in a dll. There is third-party software to do this.

(http://kmeleonbrowser.org/forum/read.php?1,141148,page=2)

Yes, there's lots of happy XP users here, I know - so I hope someone will get some good use from this info.
(It is not very useful for me as I use no win stuff newer than XP SP2 by choice.)

If anyone has done this with good success in XP SP2 I'll greatly appreciate if you'll share your success & method you used, please ??

Meantime, I'll stick with what I've got & maybe consider adding Gavotte RAMdisk to an offline only, pure old XP box that we have.

This topic has been extensively examined & well covered in lots of places:

Remove 4GB RAM Limit of Windows XPx86 extend to 128GB:
(XP64G patch)
https://ryanvm.net/forum/viewtopic.php?f=7&t=10547

Windows XP Ram Limit - Page 6 of 10:
http://www.overclock.net/t/77229/windows-xp-ram-limit/50

https://news.saferbytes.it/analisi/2013/02/saferbytes-x86-memory-bootkit-new-updated-build-is-out/

Get Windows XP x86 to recognize more than 4Gb with PAE?:
(Page 2 of 13)
http://www.msfn.org/board/topic/171482-get-windows-xp-x86-to-recognize-more-than-4gb-with-pae/?page=2

[32Bit or x86] Use more memory above 3.25GB:
http://www.msfn.org/board/topic/135806-32bit-or-x86-use-more-memory-above-325gb/

Of course since I am also a great lover of Linux & the use of VMs, none of this is really any problem as Linux has no such limitations & when using VMs of XP it is trivial to avoid problems with demanding apps.



Edited 1 time(s). Last edit at 04/02/2017 10:08PM by smallhagrid.

https://ryanvm.net/forum/viewtopic.php?f=7&t=10547
This one is made by me.