Server Utilities :: How To Use Escape Character For Loading Data Via Sql Loader

I have to load a fixed width file using sql loader utility. But the records have multiple special characters. writing / modifying the loader utility to load the data.

--Script to create the table
create table t1 (
ip1 varchar2(2),
ip2 number,
ip3 number);

--loader utility
LOAD DATA
INFILE 'c:inputfile.dat'
BADFILE 'c:adfile.bad'
REPLACE
INTO TABLE t1
FIELDS TERMINATED BY '' OPTIONALLY ENCLOSED BY '°'
(
ip1POSITION(1:2) CHAR,
ip2POSITION(3:17) INTEGER EXTERNAL ":ip2/100",
ip3POSITION(18:32) INTEGER EXTERNAL ":ip3/100",
)

--data file
9900000000000000000000059762160°
9900009694635473¶00009693856712-
99000024383898654000025664467904

--sql version i am using
SQL*Loader: Release 9.2.0.1.0 - Production on Wed Mar 7 18:32:33 2012
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

In the above mentioned data file, records has multiple special characters like '°','¶' ,'-'.
All these special characters have some meaning.
eg: '°' specifies the above column needs to be multiplied by -1
'¶' specifies the above column needs to be multiplied by -0.1

what changes need to be made in loader utility for the same? Also, will there be any change in the utility if I am using higher version of oracle?