Well I can explain the RAM timings... I agree with N!ghty that it is a big contributor to CTDs. It is very much dependent on the MOTHERBOARD that you have, as it varies from board to board.
I run EU2 with 128MB on my laptop and I don't have stability probs, I have HoI on it but haven't tried since 1.02

Game stability is not proportional to the amount of available memory, it might run smoother as you add memory but that's it. Microsoft virtual memory management isn't *that* unstable. Slow, yes, but not unstable usually...
When troubleshooting this (to whom is having problems), make sure you specify the memory brand, quantity, and the motherboard brand & model you have. And video card I guess heh
In my main box I have an Athlon 2100+ and I have Samsung DDR memory. PC2700 modules, 512MB each for a total of a gig. And the A7N8X Deluxe Asus motherboard. Sweet board, but it is a real PITA without the exact settings for memory that you have.
I first installed it in my mobo with conservative, non-aggressive RAM timings (supposedly the safe and default settings, I'll overclock later). I ran HoI first and I got a CTD as soon as I started a game (got through the intro movies ok). Same with EU2. Wondering if it was some freaky conflict with some DX setup that Paradox uses, I tried to run a few other games on my system like Neverwinter and Civ3. No dice it would crash almost straight away.
I also verified that I had the latest version of drivers for my PNY Ti4400 GeForce 4 card (still did, and I am *still* running DX8.1) which I did have.
Flustered I went on the net (IE and Nutscrape ran just fine...) and investigated further. I saw nothing that would cause these stability problems. It had to be the RAM... but how much more conservative can you get when I already was using the slowest most stable settings?
Anyway the next day at work I was speaking with a fellow EE that I work with (he bought the same board I did with similar RAM at the same time) and I asked him about his settings.
Apparently that board required high performance DDR memory to have overclocking aggressive settings. I changed this and proceeded to play a one hour session of HoI with no problems, CTDs or anything. I couldn't believe it. Never seen that before...
Ironic that the memory only worked for me in overclock mode and not factory defaults
