CF 8 instance

I am new at this and not sure if it is possible to achieve the following;
I have 2 websites accessing one MS SQL server, however each website access a different database within the SQL server.
- My action plan is to have 2 website in the IIS 6.0 (one webserver),
- in CF admin console I set the default for the 1st website - by pointing to 1 data source in my SQL server, let says > sales1
- create an instance and create a 2nd data source and point to AccoutRec in my SQL server.
So when I del/mod record in the sales1 database it will not affect the AccountRec database.

ANy suggestions would be much appreciated

DT