Karlosp.net

Other drivers for Vista x64 can be found as follows (thanks again Cyanize):
1. WebCam Driver = R173082, 1/29/2008 – XP, Vista x32, x64;
Download: http://support.dell.com/support/down…&fileid=235336
2. Sigmatel Audio = R171786, 6/13/2008 – Vista x32, x64;
Download: http://support.dell.com/support/down…&fileid=235779
3. DVD Firmware = GSA-T21N_A1R1, 4/29/2008 – XP, XP x64, Vista x32, x64, RH Linux Ent. 3, 4;
Download: http://support.dell.com/support/down…&fileid=253097
4. Intel Chipset = R153997, 9/28/2007 – Win 2000, XP, XP x64, Vista x32, x64;
Download: http://support.dell.com/support/down…&fileid=205326
5. Ricoh R5C833 = R146465, 1/29/2007 – Vista x64;
Download: http://support.us.dell.com/support/d…&fileid=194810
6. Broadcom 440 Ethernet NIC = winxp_amd_x86_64-4.60, 2/02/2007 – XP x64, Vista x64;
Download: http://www.broadcom.com/support/ethernet_nic/4401.php
7. 355 Bluetooth Module Driver = R140135, 1/26/2007 – Vista x32, x64;
Download: http://support.dell.com/support/down…&fileid=188664
8. Intel Matrix Storage (7.8.0.1012) AHCI support
Download: http://downloadcenter.intel.com/down…%2064&lang=eng

via Inspiron 1520 Vista x64 drivers – Page 5 – Notebook Forums and Laptop Discussion.