setting firefox portable as default browser?

hi everyone
using firefox portable but running it from hdd instead of a portable drive.
the problem is when i set it as default browser, links to web pages placed on desktop launches a firefox which is different than the one normally is launched.
i mean, firefox is customized in a way i want it to be, and when i launch it from the firefox shortcut on the desktop, it operates w/out any problems.
but when i set it as the default browser and click a link to a webpage/site on the desktop, it launches not the customized firefox but a different one which is not the one i customized.
also this different firefox's history is not the same as normal launched firefox. it has its own history.

how can i fix this issue so that everytime i click a link to a webpage/site on desktop, it launches not the un-customized ff, but the customized one?
thanks.

 

This is what I have used with XP:

http://windowsxp.mvps.org/defaultbrowser.htm

And here is something I found for other systems:

http://www.addictivetips.com/window...ult-browser-portable-or-installed-in-windows/

 

I use this with 7 x64: http://www.winhelponline.com/blog/register-firefox-portable-with-default-programs-in-vista/

 

thank you guys.

 

Good one! Thanks a lot