XMLport - use codeunit to Output through 3 XMLports to same file.... FIXED format

Hi

I'm thinking about using the XMLport for at FIXED-formatted file.

I think the scenario like this :
- I have 3 XMLPORT's
- - Line1, Line2, Line3
- From a codeunit I run a Loop through a table, and run Line1,Line2 and Line3 xmlports...

My File have to look like this.

PrefixLine
Line1
Line2
Line3
Line1
Line2
Line3
SuffixLine

I have tried to do it in a XMLPORT only, but can't get it to work.

The table, is the same for All 3 lines

THANKS