In wireless, compatibility is always driven by the chipset. You have to work backwards. The http://aircrack-ng.org/doku.php?id=slitaz documentation page describes which patched drivers are included. Basically supporting atheros, RT73 and RTL8187L chipsets. So if your card is one of those and WG511T is atheros so it will work. Per that documentation page, since your card is PCMCIA / Cardbus then enter “modprobe yenta_socket” prior to running the script to load the wireless device drivers.