Post your config file, I can modify it so it will see your RAM.
I had problems with MDK's kernel, my usb mouse wouldn't work :( the 2.6.3mm feels faster for my desktop.
The only thing I think you'll be missing out on is supermount. There is a patch for that if you think you need it, I can give you instructions on how to add it.
Are you using a 2.4 or 2.6 series kernel?