Wow! After reading those last few posts by Duch, I was quite bewildered to say the least!!!
Other than the PNG/ GIF mix-up, the addon packs have been working fine! I'm unable to answer those questions positively!!!
Please read the doc file (RTF document) included with the addon packs. It explains pic directories, background names and map folders, that have to be correctly named, copied or just available in their corresponding directories. As for the Alcoves - again these have been working correctly.
The only glitch that I have been unable to correct is the load/restart mechanism. Please be sure to exit the game and then restart/load. Loading in saved positions without doing this will resort in graphical errors. But this has been documented elsewhere.
Anyway, noted on the image formats - these will be corrected ASAP!!!
EDIT:-
Just to add, due to the new modifications, all alternate map sets must now be in the "Maps" folder. EG - Maps\greywalls or Maps\twowalls ETC.
The backgrounds must also be in the corresponding folders.
Double checked the alcoves just to be sure - no probs here. If using the two-wall method, use the 4-sided alcoves as alternate wallsets which, in turn, must be in their own folders. For an example look at the twowalls pic directories within the addon packs.
For other examples please examine the doc file included.
Another EDIT:-
Yep. I've just uninstalled everything to do with DMJ then re-installed again. The pic directories, alcoves, walls etc are all okay. The only glitch is the telepoters as I am already aware, but everything else is working as it should do.
Please remember before installing the addon packs, delete or remove and backup all the folders form within the Dungeon Master Java directory -
do not uninstall.
Then install the addon packs respectively. This solves many issues regrading graphical errors.
Also, as Ian as already pointed out, if creating a fully working "game" do not change the maps on the first level. Leave these as default. (The default maps can be whatever you like, but do not change the pic directories within the editor for the first level. They must be at default settings). Graphical errors will occur otherwise.
http://img101.imageshack.us/img101/1913/exampleyh2.jpg
Here's an example of the pic directories. The "background" images are in their own corresponding folders -
eg:- Maps\twowalls\back.gif
eg:- Maps\town-rainy\back.gif etc..etc....