$ more tmp1
2|LAX|06/02/24 13:12:35|sf49ers|30|M
3|OAK|06/02/25 11:12:36|goraiders|27|F
1|SFO|06/02/24 12:12:34|hawkeye|35|M
4|PIT|06/02/25 12:12:37|steeler|35|M

$ nawk 'BEGIN {FS="[ |/]"}
{
printf("%s|%s|%s/%s/%s %s",$1,$2,$4,$5,$3,$6);
for(i=7;i<=NF;i++)
{
printf("|%s",$i);
}
printf "\n";
}' tmp1
2|LAX|02/24/06 13:12:35|sf49ers|30|M
3|OAK|02/25/06 11:12:36|goraiders|27|F
1|SFO|02/24/06 12:12:34|hawkeye|35|M
4|PIT|02/25/06 12:12:37|steeler|35|M

You can clearly see the date format changing to MM/DD/YY...

Is it not what you are looking for ?? what do you mean by same as b4 ?

I think the format of your flat file is different than what you have posted if it is not working....