Thanks. I did find it a bit after I posted. It’s the same link than the one for the Windows drivers in the “Driver software” table… except that the “Mac” column isn’t linked. The only mention that the Mac drivers are there too is below, in the part where it says “Driver Software for Windows PC and Mac” (and then says “This driver software is required for PC to recognize the P2 Card” (no word about Macs), and *then* says “Please prepare:1.PC or Mac”…)
Anyway, I installed the drivers (which are version 1.03) in the Powerbook (which had the v1.01 drivers), and it worked. My only nagging doubt is that the instruction sheet by Panasonic says that the drivers need OS X 10.4.8, but the Powerbook still has 10.4.5; neverthless, everything seemed to work. Should I upgrade to 10.4.8 anyway?