I have a Netgear WG511, identified as an Intersil ISL3890 card that works fine with GTDriver and allows MAC address customization. Problems occur when I try KisMAC to scan with the Netgear card, I get the message "Could not Instantiate Driver: KisMAC was able to load the driver backend for PrismGT based Card, but it was unable to create an interface." Restarting and reinstall did not help. Anybody had success using PrismGT cards with KisMAC? Note for ebay sniffers: WG511 cards with Serial Number starting with WG51 are based on PrimsGT chipsets (http://prism54.org/forums/viewtopic.php?t=1096&highlight=wg511+serial and http://kbserver.netgear.com/products/wg511.asp). Other model may not. Worked for me. antoine System 10.3.8 with KisMAC R62 and GTDriver 0.91. Console.log gives: 2005-08-25 10:26:28.154 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:28.559 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:28.963 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:29.368 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:29.772 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:30.177 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:30.581 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:30.986 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:31.392 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:31.796 KisMAC[545] IOConnectMapMemory 0xe00002c2 2005-08-25 10:26:39.902 KisMAC[545] Error could not instanciate driver WaveDriverPrismGT and System.log: Aug 25 10:27:01 localhost kernel: AirPortFirmware: start Sta f/w download Aug 25 10:27:01 localhost kernel: AirPortDriver: Ethernet address 00:xx:xx:xx:xx:xx Aug 25 10:32:33 localhost kernel: IOPCCard info: cs: cb_alloc(bus 1): vendor 0x1260, device 0x3890 Aug 25 10:32:33 localhost kernel: IOCardBusDevice: binding socket 0 function 0 to card services. Aug 25 10:32:33 localhost kernel: IOPCCard info: cs: cb_config(bus 1) Aug 25 10:32:33 localhost kernel: IOPCCard info: fn 0 bar 1: mem 0x90002000-0x90003fff Aug 25 10:32:33 localhost kernel: IOPCCard info: irq 255 Aug 25 10:32:34 localhost kernel: GTDriver: Ethernet address 00:09:5b:45:37:ff