Oracle Database Discussions

Hi
I am using Informatica to use sqlldr to load multiple files into a partitioned table A
DIRECT=TRUE &
PARALLEL=TRUE

Table A has indexes on it which have been made UNUSABLE through a script. (Dont want to drop and recreated them)

Through informatica I cannot set the parameter

SKIP_INDEX_MAINTENANCE=TRUE

Is there any method through which I can set it as an environment variable on Unix and pass it to sqlldr.

OS: HP UX
DB: 10g R2

Any help is appreciated.