I read your helpful comments with interest, however I'm willing to put my hand on a "stack of bibles" and truthfully say I had SH3, GWX with mods working on 1 Meg. I have the receipts and the System Information data confirms my comments.
I purchased the PC locally in November with 512K and upgraded to 1 Meg around 2008 when the increasing amount of mods I was installing started to considerably increase the loading time and decrease the response.
It is only in the past two months that I have had CTD's. A motherboard was replaced and the informed opinion on this thread suggested that I had to increase RAM.
I had this done last Friday. Now at 2 Meg, and hey presto.....everything loads quickly and works. (Magui F, GWX and a number of mods).
Now I might even try MFM Lite. Whadya think?
In the interests of further enlightenment, I'm prepared to answer any questions on my PC set up, post my mod list etc etc to clarify this matter. I simply can't think I've got or achieved anything unique.
Anyway, thank you gentlemen for the very friendly and helpful advice that got me back up and using SH3 again.