They will both talk to each other, or to any 802.11b wireless AP or router on the market. The restriction is that the silver card is limited to 64 WEP so that limits the WEP you can use on everything else.
Having said that you really need to consider if you need to use WEP. I don't. It takes significant bandwidth and really is a bit OTT unless you have malicious hacker neighbours or you do on-line banking or you are a goverment agent.
IMO more important is to use the MAC authentication and secure your PCs with passwords.