A friend of mine has the DVD bundle pack. I'm actually tempted to buy it myself, even though I have all the games, just to have it all on 4 DVDs instead of 4DVDs per game.
As far as modding goes, the folder structure is slightly different. Its on my friends computer, so I can't double check right now but its because the disk with KotOR also has EAW on it. Anyway, instead of the override folder being "\LucasArts\SWKotOR\override" its something like "\LucasArts\SWKotOR\Gamedata\Override."
Its a small difference, but it might throw off some modding tools like KT and whatnot. You would just have to set them manually to add the "gamedata" folder. I haven't tried it yet, but thats the only complication I can see.