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Pardon, to my knowledge there's only one keytool command with regards
to java:

<http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/keytool.html>

Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Documents and Settings\Administrator>keytool -genkey -alias thufir9
Enter keystore password:
keytool error: java.lang.NullPointerException

C:\Documents and Settings\Administrator>cd C:\WINNT\Profiles\All Users\

C:\WINNT\Profiles\All Users>dir
Volume in drive C has no label.
Volume Serial Number is FCD2-42DE

Directory of C:\WINNT\Profiles\All Users

03/29/2006  07:15p      <DIR>          .
03/29/2006  07:15p      <DIR>          ..
03/29/2006  07:15p      <DIR>          Adobe
              0 File(s)              0 bytes
              3 Dir(s)     551,309,312 bytes free

C:\WINNT\Profiles\All Users>cd ..

C:\WINNT\Profiles>dir
Volume in drive C has no label.
Volume Serial Number is FCD2-42DE

Directory of C:\WINNT\Profiles

03/29/2006  07:15p      <DIR>          .
03/29/2006  07:15p      <DIR>          ..
03/29/2006  07:15p      <DIR>          All Users
              0 File(s)              0 bytes
              3 Dir(s)     551,309,312 bytes free

C:\WINNT\Profiles>

The page from Sun suggests:

"Each keytool command has a -keystore option for specifying the name
and location of the persistent keystore file for the keystore managed
by keytool. The keystore is by default stored in a file named .keystore
in the user's home directory, as determined by the user.home system
property. "

But I can't find such a directory as suggested by the page :(

-Thufir