Made stupid mistake, how can I recover?

Hi all,

I installed the Enterprise edition of Oracle on a home machine and then, after experiementing for a while, tried to install the Oracle Management Server. Halfway through, the computer ran out of memory and the thing just stopped.

Since then, I have been unable to login using any of the accounts that I used before. Is there anything that I can do, other than reinstall?

TIA. Paul...

-- 

plinehan __at__ yahoo __dot__ __com__

XP Pro, SP 2, 

Oracle, 9.2.0.1.0 (Enterprise Ed.)
Interbase 6.0.2.0;

When asking database related questions, please give other posters 
some clues, like operating system, version of db being used and DDL.
The exact text and/or number of error messages is useful (!= "it didn't work!").
Thanks.
 
Furthermore, As a courtesy to those who spend 
time analyzing and attempting to help, please 
do not top post.