SAPDB Locked Up

Hello,

I have SAPDB 7.4 installed on Windows XP.  I've used the DB Manager to
create 3 instances.  I'm having problems that make sapdb unusable.

1.  How do I delete an instance?  I cannot find this in any of the
documentation?

2.  How do I completely remove sapdb from my computer?

3.  When I was loading data to a table, the database locked up.  There were
no other operations occurring, and the load was simply the insert of about
100,000 records.  I had to kill the loading process.  I ran the exact same
load job into Microsoft Access and it worked.  I believe somehow sapdb was
locking itself, but I'm not sure.  So, I tried dropping the table and
recreating it.  This did not help, and I ran into the same problem.  Then I
tried recreating the instance.  This did not help.  Then I tried
uninstalling sapdb from the computer.  This was a difficult process.  After
I reinstalled it, I created the instance again, and it said it was already
there.  I must have not uninstalled it completely.  And, when it tries to
install an instance, it fails and I get this message:  24994 runtime
environment error [db_cold -f]; -2, Kernel start failed

Any help would be appreciated.

Joe Garrett
Minnesota, USA