Import bank transactions and mark bill as paid?

[Remi Christiaan Cool]

When I import a MD940 file from my bank ... the items are imported and 
booked ok, but I'm not able to manually set a bill to payed. The only 
way as far as I have discovered is to first pay the bill so a record 
exists and then select that record during the import procedure (R). 
Paying the bill when the import window is open, doesn't work, the entry 
doesn't show up. That's stupid because for that I have to examine my 
bankaccount first, make bookings manually and that's what I want to 
prevent. Another thing is that if you select a preexisting record in the 
import window, the data from the import is not used in the 
description/memo fields, the old entry remains unchanged.

So is there a way to just mark a bill as payed or is there some other 
trick to make it work ... put a unique code somewhere so that bills are 
recognized somehow?

I'm using GNUCash 2.2.9 on Windows Vista sp1 (don't worry I have 
Debian/KDE in virtualbox :) )

Thanks,
Remi