<p>After downloading files from a remote UNIX FTP server, you want to verify that you have downloaded all the files correctly. Minimal you will get information similar to "dir /s" command in Windows command prompt. The FTP client runs on Windows.</p>

Sadly this was written for Unix/Linux users :/
Personally, I would install CYGWIN just to get Linux binaries of LFTP/RSYNC to work on windows, as there appears not to be anything that competes with it.
As @zadok.myopenid.com 
mentioned rsync, this appears to be a windows build for it using CYGWIN ( if you manage to be able to get ssh access to the box eventually )
http://www.aboutmyip.com/AboutMyXApp/DeltaCopy.jsp
Rsync is handy in that it will compare everything with check sums, and optimally transfer partial change blocks.
If you get CYGWIN/Linux:
http://lftp.yar.ru/
is my favorite exploration tool for this.
It can do almost everything bash can do, albeit remotely.
Example:
```
$ lftp mirror.3fl.net.au
lftp mirror.3fl.net.au:~> ls                          
drwxr-xr-x  14 root     root         4096 Nov 27  2007 games
drwx------   2 root     root        16384 Apr 13  2006 lost+found
drwxr-xr-x  15 mirror   mirror       4096 Jul 15 05:20 pub
lftp mirror.3fl.net.au:/> cd games/misc
lftp mirror.3fl.net.au:/games/misc>find
./
./dreamchess/
./dreamchess/full_game/                                                      
./dreamchess/full_game/dreamchess-0.2.0-win32.exe                                      
./frets_on_fire/
./frets_on_fire/full_game/                                                      
./frets_on_fire/full_game/FretsOnFire-1.2.451-macosx.zip                                  
./frets_on_fire/full_game/FretsOnFire-1.2.512-win32.zip
./frets_on_fire/full_game/FretsOnFire_ghc_mod.zip
./gametap_setup.exe
......
lftp mirror.3fl.net.au:/games/misc> du gametap_setup.exe 
32442   gametap_setup.exe
lftp mirror.3fl.net.au:/games/misc> du -sh gametap_setup.exe 
32M     gametap_setup.exe
lftp mirror.3fl.net.au:/games/misc>
```