Oracle Database Discussions

I'm a newbie in Oracle DB.

I've been assigned to a new task to assist DBA teams to migration SQL server to Oracle server. I got a new PC which pre-installed 2 Oracles version (9i & 10G), the 9i is OK but the 10G DID NOT work properly and I'd liked to replace 10G release 1 with 10G release 2 (for testing purpose).

I did followed the instruction how to remove the 10G release 1 using the OUI, but the process ran forever ... ( see screenshot --> http://img137.imageshack.us/img137/5555/oui10g1qb8.jpg )
I'm also know that I can delete Oracle thru Regedit, but in some Reg. keys do not show the Oracle version (I want to keep the Oracle 9i).

Could someone please enlight me how to uninstall Oracle 10G ?

PC's info:
OS : Windows XP Prof.
1GB RAM
50GB free space
All the Oracle services have been disable before Uninstall.

Thanks Advance.
DTH.