Saving all settings/profile/mails on other drive

Hi,

I am put ThunderbirdPortable into D:\Progs\Thunderbird
All my files will be saved in Data/profile, Data/plugins, Data/setting folders now.

How i can replace folder for all settings/profile/mails/plugins to other disk (C:, F: ... not D!).
in Source/ThunderbirdPortable.ini i can use onle *relative* path. Why not absolute path?

in Readme.txt
The ThunderbirdDirectory, ProfileDrectory, PluginsDirectory and SettingsDirectory entries
should be set to the *relative* path to the directories containing Thunderbird.exe, your
profile, your plugins, etc. from the current directory.