Logged In: YES 
user_id=341410

After doing some more playing around, I discovered a few
other examples that would kill either method described below:
HOME=%USERDRIVE%%USERPATH%
HOME=C:\%userprofiles\%USERNAME%

The real trick is that % can exist in a path on windows, so
even c:\%HOME% is a vaild path:
 Directory of D:\test

03/26/2004  03:58p      <DIR>          .
03/26/2004  03:58p      <DIR>          ..
03/26/2004  03:59p      <DIR>          %HOME%
               0 File(s)              0 bytes
               3 Dir(s)   5,355,511,808 bytes free

D:\test>

I suppose the question remains as to what cases do we want
to cover.  If we assume that there aren't any % symbols in a
path, then the code is straightforward, and I can have a
patch for you in a few minutes.  If % can be in a path, then
the problem is a pain, and a miniature parser needs to be
written to deal with it.