Move Firefox user settings to another folder on same machine

See this mozillaZine article : Moving your profile folder.

It describes several ways of achieving your goal:

• Using the Profile Manager to move your profile
• Create a new profile and copy the old one over it
• Create a new profile and migrate your old data
• Modify profiles.ini to point to the new location (Advanced)

Thanks to answer by harrymc, i found the information on how to tweak the file profiles.ini. Here are the exact steps I used:

Go to folder %APPDATA%\Mozilla\Firefox

Move your profile data folder (randomly named: 0uq81z89.default) to c:\firefox_profiles\

Edit %APPDATA%\Mozilla\Firefox\profiles.ini to point at new location:

[General]
StartWithLastProfile=1

[Profile0]
Name=default
IsRelative=0
Path=C:\bin\firefox_profiles\0uq81z89.default

This works like a charm. Thanks everybody for contributing with answers