All the drivers are built into the kernel, With dapper came a upgraded kerenel which probbaly includes your drivers when the old beezy kernel didnt.
Run this command and find out what driver your wifi is using, If it is a usb card look at the "usbcore" line
That is the name of the dirver, then run
and you will see where the file is. It is usually something like /src/kernelxx/drivers/net/wireless
You can try and save the driver files, but they wont work with any other kernel versions so say you have kernel 2.6.15-26-k7 on dapper now and you install say fedora at kernel 2.6.15-25-k7 then then dapper files wont work, But if you find a distro with the same kernel you have now they should already be included,