Amazing TIP !

Multiple Dropbox (Do It Yourself)

Great chance you know already how to run multiple dropbox... the very easy way
Yes, by using run as (that is right click on the dropbox shortcut choose "run as.." then select user other than current user) in XP, best candidate for "other user" is administrator because it's ghost user (not shown in login screen by default) 

Or you can use dropboxen

But let me tell you another way, no need additional programs, no need to create another users, much flexible, portable and more DIYer :)

Right click on dropbox shortcut in startmenu, click properties, in target box look for where dropbox.exe installed in my case:

"C:\Users\qwerty\Application Data\Dropbox\bin\Dropbox.exe" /home


Now prepare create a new folder yourself where you will place a copy of installed dropbox, it could be anywhere even flashdisk.
Browse with explorer to until you reach bin folder (of target box above). There copy all files to your prepared folder -> this means you should have dropbox.exe there.

Sample of bat triggered version

@ECHO OFF
ECHO. This is for fun not exploitation!
SET USERNAME=Joni
SET USERPROFILE=%CD%\%USERNAME%
ECHO. Setup Appdata for NT 6...
MKDIR "%USERPROFILE%\AppData\Roaming"
ECHO. Setup Appdata for NT 5...
MKDIR "%USERPROFILE%\Application Data"
START Dropbox

Paste above text in notepad.

A little explanation, what I basically do above is to trick dropbox for thinking that it has been run by another user. Back again, you may freely change "Joni" into anything. it doesn't matter if the username doesn't even exist in your windows.

Save your notepad before as "drop1.bat" in your prepared folder too.
Double click that drop1.bat :) You know what to do next..
Recreate bat file with different username if you need more dropbox. 

these steps has been tested on Dropbox 0.7.110 under Windows XP and Windows 7 (Seven)

Alternate bat (shortcut triggered) much flexible but need care:
@ECHO OFF
ECHO. This is for fun not exploitation!
SET USERNAME=%1
SET USERPROFILE=%CD%\%USERNAME%
ECHO. Setup Appdata for NT 6...
MKDIR "%USERPROFILE%\AppData\Roaming"
ECHO. Setup Appdata for NT 5...
MKDIR "%USERPROFILE%\Application Data"
START Dropbox 

Save it as droploader.bat in your prepared folder.
In this case, you didn't need to recreate/edit another bat file if you need another dropbox.
Instead create a shortcut of droploader.bat, Right click the shortcut and click properties. In target box add argument to droploader.bat with [username] each time you need more dropbox.
for ex in target box.:
D:\Dropbox\bin\droploader.bat joni
It will automatically setup everything for account Joni, just run the shortcut (O yeah, it would be neater if you rename the shortcut with [username] like "Joni's Dropbox" then copy this shortcut to your desktop, to your startup folder... wherever you want)

In Windows XP: