Fedora core 2 is more stable than PCQLinux. It uses 2.6 kernel. you'll lack some features like usb support in pcqlinux. But pcq linux has lots of tools bundled with. i suggest u to install fedora core 2, and if u need those tools bundled with pcq linux, you can install it using the rpms.
Riyaz Usman
PS :Any redhat based distro (ie fedora or pcqlinux) needs high system requirements, if you have a pc with atleast 256 mb RAM, you can opt Fedora, otherwise go for soe other distros like Mandrake or Xandros)