I accidentaly ran a DELETE command against a table with a wrong WHERE clause.
I am using SQL Server 2005.
Is there a way that could help me recover the lost
You have Full data + Transaction log backups, right? You can restore to another Database from backups and then sync the deleted rows back. Lots of work though...
(Have you looked at Redgate's SQL Log Rescue? Update: it's SQL Server 2000 only)
There is Log Explorer