Linksys Just Ain't Happening

Here's something that doesn't work, my Wireless-G Broadband Range Expander (model number WRE54G) and the Wireless-G Broadband Router (model number WRTP54G) -- both by Linksys. They are incompatible. Sweet! I spent about 90 bucks on the range expander (and about 40 minutes trying to get it to work) and it is useless. And I discovered a Linksys Wireless-G Print Server (WPS54G) I have is incompatible with a HP Deskjet 5940 printer I bought to try and get the wireless printing up and running. I got the HP Deskjet to replace an all-in-one HP PSC 2110xi which was incompatible with the Linksys Wireless-G Print Server. This after spending at least an hour and a half with Linksys, trying to get the wirelss print router to work with the all-in-one. Linksys customer support ended up blaming HP, they said it was an HP driver problem. I discovered online, Linksys wireless print servers just don't like all-in-one printers -- period. Another 90 bucks down the tubes. Linksys, you got me. I am a dope. I buy your products (I bought all of these at the same time!) and assume they will work with each other.