Deinstall by deleting resistry keys

I have tried to deinstall my SQL Server Enterprise Evaluation Edition so I c
an reinstall my newly purchased Developer Edition License. I originally trie
d to upgrade, but the upgrade failed. Attempts to deinstall the from the Win
dows Add/Delete Programs ap
plet have also failed.
I followed the instructions at http://support.microsoft.com/?id=290991 inclu
ding backing up my system state and deleting regisitry keys. I went as far a
s I could removing all known instances and using full text removal. When I t
ry to reinstall, my old del
eted instance name is the only one that appears in Enterprise Manager and of
course I cannot see the instance I tried to install.
Deinstalling the instance I just triesd to install, I went back to look at t
he registry again. I noticed a registry folder under LOCAL_MACHINE>SOFTWARE
>MICROSOFT that was named SQL_REDIST containing a folder named 1.00.000 and
one named Setup.
Should these also be deleted?
Thanks!I seem to have reinstalled successfully.
I went back through the new install procedure and made sure to name a new in
stance instead of taking the default instance in the wizard. I named the new
instance the exact same name as I had on the Evaluation Edition instance an
d everything now seems to b
e working.