customizing C-l (inserting link with file:) for dual-boot

[Patrick Drechsler <patrick@pdrechsler.de>]

Hi,

I've been using Org-Mode for a while now and would like to know how to 
configure the `C-l'-command (inserting a link) to work on a dual boot 
system.

Here is what I am trying to accomplish:

Inserting a link to file works fine using the command `C-l'. But off 
course it makes a difference which OS I use.

I have a working Emacs-Snapshot on a dual boot machine (both similar 
versions 22.0.50.1).

For Org-Mode (and its agenda files) I use the following configuration:

-------------------------
(cond
  ((file-directory-p "C:/Programme")
   ; do Windows stuff:
   (setq org-directory "F:\org-stuff")
   (setq org-remember-templates
	'((?t "* TODO %?\n  %i\n  %a" "F:/org-stuff/TODO.org")
	  (?j "* %U %?\n\n  %i\n  %a" "F:/org-stuff/JOURNAL.org")))
   (setq org-agenda-files (quote ("f:/org-stuff/computerstuff.org" 
"f:/org-stuff/heinzerling.org" "f:/org-stuff/THESIS.org" 
"f:/org-stuff/privat.org" "f:/org-stuff/TODO.org" 
"f:/org-stuff/JOURNAL.org")))
   )
  ((file-directory-p "/home/patrick/")
   ; do GNU/Linux stuff
   (setq org-directory "~/data/org-stuff")
   (setq org-remember-templates
	'((?t "* TODO %?\n  %i\n  %a" "~/data//org-stuff/TODO.org")
	  (?j "* %U %?\n\n  %i\n  %a" "~/data//org-stuff/JOURNAL.org")))
   (setq org-agenda-files (quote ("~/data/org-stuff/computerstuff.org" 
"~/data/org-stuff/heinzerling.org" "~/data/org-stuff/THESIS.org" 
"~/data/org-stuff/privat.org" "~/data/org-stuff/TODO.org" 
"~/data/org-stuff/JOURNAL.org")))
   )
)
-------------------------

What would be a simple way to adopt this feature when using `C-l'?
My GNU/Linux partition is: ~/data
My WindowsXPSP2 is:        f:/

They both reach the same directory.

I'd like `C-l' to think the same way.

Can I store the variables "/home/patrick/data/org-stuff" (for GNU/Linux) 
and "F:\org-stuff" (Windows) in a variable?

Any ideas?

Regards

Patrick