Starting with JPortal V1.3 there is limited support for HQ Pictures.
Since this was implemented in the time of about 1/2 an hour the support is:
as said - limitted
you have to "install" the pictures manually
What steps to take:
first identify the sets you have in JPortal, pictures of supported sets (once downloaded from gatherer) are kept in the directory (allways starting of with the main dir JPortal)
"sets"
within that directory subdirectories are kept for all downloaded sets, like
sets\Portal
sets\Portal Second Age
etc.
Within each of these directories manually create a directory called
full
download the HQ pictures for the sets you need from the Slightly Magic forum:
http://www.slightlymagic.net/forum/viewtopic.php?f=15&t=445
remember to download the sets marked as full
extract the downloaded pictures from their ZIP archive and copy the pictures in the corresponding "full" directory.
done
To view a HQ picture of a card press CTRL and LEFT MouseButton. In almost all windows/screens this should open a seperate modal window which shows the HQ picture of the card.
If no windows appears - than the HQ picture was not found!