It was very hard to make my token-ring PCMCIA card to work with RH6.0. Acording to http://www.linuxtr.net/ , there is a bug in kernel 2.2.5 (provided with RH6.0). To make PCMCIA work properly, we need kernel>=2.2.10+patch+PCMCIA>=3.0.13. See http://www.linuxtr.net/
kernel 2.2.11 & pcmcia 3.0.13 are in Raw Hide.