Well, I had been trying to get DOS games to work long before I discovered the majority of them I'm using now. A Doom TC I liked to play was not running on my new computer, and I tried for 3 straight years.
I was going to remove the RAM. I have a Dell Dimension 8200 which, ironically enough, started with 512mb (2 256 sticks, and two dummies). My brother had a near identical computer, and he was no longer able to use his ram because the new motherboard he was getting did not support RD when he got a new computer. So he gave it to me. My friend installed it for me (as I am rather hardware illiterate) with me, my brother, and another friend there to watch.
When I actually went to temporarily downgrade to 512, I couldn't, because I didn't know what sticks were originally there, and neither could anyone else who had been there. I was told by Dell tech support that if the wrong ones were removed, my computer would be fried. Fun stuff!
In the end I simply couldn't do it for this reason.