SAmalathion, Did you ever find a tftp cleint ? I saw this one today:
FTPRush
You can download a trial version.
The info on the Shareware Connection site says it's compatible with x64:
Publisher: TianHong.NC China | License: Shareware | Price: 29.95
Version: 1 | Size: 4458 KB | Platform: Win98,WinME,WinNT 4.x,Windows2000,WinXP,Windows2003,Windows Vista Starter,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Business,Windows Vista Enterprise,Windows Vista Ultimate,Windows Vista Home Basic x64,Windows Vista Home Premium x64,Windows Vista Business x64,Windows Vista Enterprise x64,Windows Vista Ultimate x64
Released Date: 26-05-2007 | Rating: 5 | Title: FTPRush
Originally posted by: SAmalathion
I can't seem to install the firmware since my Windows xp 64-bit doesn't have "tftp" which both DD-WRT and Tomato say is required to flash the router. Is there any way around this?