Publisher is ideal for doing this. At the print shops I've owned, I've
produced thousand of business cards (many of which were two sided and/or
foldover) and never used anything other than Publisher. To me, the key to
successful printing of business cards is to start with a blank sheet - DO
NOT USE WIZARDS OR TEMPLATES. If you are using preperfed card stock, then
you will have to position the card images to conform exactly to the
placement of the cards on the sheet which is quite easy to do. However, if
you are using full sheet card stock which isn't perfed, then you have more
flexibility. I'm not familiar with using A4 sheets, but with 8.5x11 inch
sheets you can get 10 cards per page in portrait mode and 12 cards per page
in landscape mode. There is no need to create a publication with two pages
or to create two publication with one page each. One page will work fine. If
you decide to print in landscape mode and assuming the cards are 2x3.5
inches (I know metric sizes will be slightly different) there are two ways
of doing this. The first is to set up the page size to that of two business
cards, i.e. 4x3.5. Use the top 2x3.5 inches for one side and on the other
create the back side - but here is the key - one of the card images must be
rotated 180°. You will also have to go into the printing options to specify
that multiple images should be printed on the same sheet. Set the gap to
zero and the top and side margins so that the set of images (all 12) will be
centered on the sheet. Centering is absolutely critical since you will print
the sheet to get one side and then flip the sheet over and also rotate it
180° to print the second side. The second and perhaps easier way is to use a
full sheet setup. On 8.5x11 card stock in landscape mode, you will have
three columns of cards by 4 cards deep. Create the front and back sides of
the cards. Position one image and then position the other image at the
bottom edge of the first image. Be sure to rotate the bottom image 180°.
Group those two images and then copy and paste so that you create 3 columns
x 4 rows. Once again make sure the entire set of cards is centered so that
all outside borders are equal. On 8.5 x 11 stock, that would be .25 inches
of scrap to be trimmed. In the event you are using preperfed stock in
portrait mode, the procedure is the same, but make the image in the left
column all of side one and in the right column, all of side two. For this,
you do not rotate the image since the card stock is only being turned over
and not rotated. There are a number of ways to print cards, but I can assure
you that once you get used to what I've laid out, printing business cards
will be a breeze. Common in the printing industry is to print cards 4up,
i.e. use a strip of card stock 8.5 x 3.5 or two up = 4.25 x 3.5. Either one
of these also work well with the flip & turn method I've described. If you
can precut the card stock and if your printer will handle that size paper,
then that works fine.