MS Access DB Read-only

how to modify this script to make the connection to the MS Access database read only, so that writing to the database directory is no more necessary (currently, I have to give IUSR write permissions so that the .LDB file can be created... but I don't need that because I want the database to be read only, and I don't want to grant write permission to IUSR).Code:
----
cst = "Provider=Microsoft.Jet.OLEDB.4.0;" &_
"Data Source=" & Server.MapPath("/database/riviste.mdb")
set conn = CreateObject("ADODB.Connection")
conn.Mode = 1
conn.open cst
strSQL="SELECT * FROM riviste ORDER BY Titolo"
set rs=conn.execute(strSQL)
----