This same file is posted here on driverguide.com with a different name. you can download it by using this link:
or here: http://rapidshare.com/files/157915015/sp34152.exe
According to the upload wizard, this is the file info:
Broadcom BCM-4321AG Wireless LAN adapter
file size: 4.3MB
file name: sp34152.exe (file tested and is virus free)
OS supported: Windows 98SE and Windows NT4.0, but the inf file contains instructions on how to make it work in XP and Vista.
Used in "Compaq Presario F505LA"
Anyone who tests this file, please leave a comment as to working/not working.