mod_rewrite puzzle

[clartsonly]

Hello,
I am in a slight dilema, microsoft stopped the URL structure of http://username:[e-mail]/page1.html, back in february.

One of my previous applications logged people silently into an oracle web solution using apache with mod_plsql, since the microsoft patch http://support.microsoft.com/default.aspx?scid=kb;en-us;834489
this has not been possible, I have spoken to oracle and they have suggested the registry entry amendment supplied by microsoft which solves the problem but not every client can do this, after more discussion mod_rewrite was suggested. but after reading the two documents the reference and guide, I still do not know any whether this is possible.

can anyone give me any pointers as to whether mod_Rewrite can turn something like this

http://mysite.com/startpage.html@User=stuart&Password=apples

to

http://stuart:[e-mail]/startpage.html

and if these amendments are made to the URL, is it just handled in apache or does the ie client re-parse the URL ( and fail it ) ?

thanks