Just wanted to let everyone know that the Linksys Wireless-G PCI adapter with SpeedBooster dropped right in to my old PowerMac (433 MHz, i think) and was picked up as an Airport card with no problems. The mac is now in my boy’s room and is working just fine.
I thought I would post this because most of the research I found was focused on another brand which had to be a specific model. I bought this card at Walmart and had no issues with it at all.