Help in using DATFMT in RPG/400

Hi 
1. Why can't I use DATFMT(*ISO) with DATSEP('/') for a field in Physical file? 
If it is a limitation ...any workaround ?
The default for *ISO is yyyy-mm-dd.

2. While displaying this field on to a Subfile, can I convert it to yy/mm/dd 
using some edit code or I have to do the conversion in RPG code and then 
display it?

3. Another problem is that I am using TIME to retrieve the current system date 
(can't use UDATE/*DATE which gives job date so it doesn't change if job was 
started just before midnight). But TIME does not give century (out put for time 
is yymmddhhmmss). How can achieve that in RPG code? I want to store the output 
to PF field mentioned in point 1. One way would be retrieving century from 
*YEAR, and rest of the date-time from TIME opcode! Wanted to know if I am 
missing any opcode, which could do it directly!!

Would really appreciate any help on this.

Regards,
Sachin Chaudhary.
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