singleplayer and multiplayer updates

I do not understand a few things, so:
1) Will be ever any new multiplayer updates? Newest update on wiki in multiplayer guide: http://www.slightlymagic.net/wiki/Multiplayer_Dueling links to update dated 2009-03-18 (if I understand correctly that file name contains date of update).
2) I did notice a few posts on forum that new cards do not appear or do not quite work in Shalandar (= so they are not for singleplayer mode). If new updates do not work in multiplayer also (look at my first question), what are they for?
3) I'm playing with friends over internet using Hamatchi and included "original" decks (we did not construct any new decks so far). But from time to time I would like to enjoy "fresh new" singleplayer mode also. I would like to have it updated to most current version as (as I read on forum) it is probably needed to update in-game graphics. How to play these two things at the same time? Do I need to waste my precious HDD space and do second full installation designed only for singleplayer?
1) Will be ever any new multiplayer updates? Newest update on wiki in multiplayer guide: http://www.slightlymagic.net/wiki/Multiplayer_Dueling links to update dated 2009-03-18 (if I understand correctly that file name contains date of update).
2) I did notice a few posts on forum that new cards do not appear or do not quite work in Shalandar (= so they are not for singleplayer mode). If new updates do not work in multiplayer also (look at my first question), what are they for?
3) I'm playing with friends over internet using Hamatchi and included "original" decks (we did not construct any new decks so far). But from time to time I would like to enjoy "fresh new" singleplayer mode also. I would like to have it updated to most current version as (as I read on forum) it is probably needed to update in-game graphics. How to play these two things at the same time? Do I need to waste my precious HDD space and do second full installation designed only for singleplayer?