Before installing any Wesnoth packages, perform the simlink from the terminal like this (make sure you install rootsh from the application manager first).

NOTE: I find that using an ext3 formatted memory card works best. It may have just been because I was doing the simlink wrong when I was using a vfat formatted memory card, but I never got it to work. I know that there are some linked files in the wesnoth-data package, and I don't know how vfat handles these. If anyone has success using a vfat memory card, please post it here.

From the terminal, type the following three commands (replace mmc1 with mmc2 to install to the internal memeory card):

After this, all data files, music files, and campaign files install to the card.

As far as right-click, I have never gotten it to work - but I have also never really tried. I find the game to be perfectly playable without it (as nobodysbusiness said, the actions menu works for most situations). I suppose one of the things you miss out on is terrain information, but I tend to play without this anyway.

Hope this helps.