Note the tiny amount of memory available. Knoppix will run slowly on such a system. I cannot speak to PCLinuxOS, but KDE will crawl on 64megs.
When giving advice to people with limited machines, don't forget they are not going to be able to run normal distros very well or at all.
To the original poster:
Get more memory if at all possible. Just because you can run an OS on 64MB does not make it a good idea. Millions of computers with more RAM than that are scrapped worldwide, so keep an eye out for leftovers.
Damn Small or Puppy will function properly on that sort of hardware without additional memory. That's why they are frequently recommended.