How to disable original houses when using the canadian city buildings set? (in openttd using opengfx)
CanCity is not a complete town replacement set yet. There are not enough buildings in the set to cover all TTD 'original' buildings. The GRF needs to take care of old houses, you cannot do that. The next version of CanCity will cover all houses. If you don't like the ones from the base set, you may want to add TTRS v3.0 (I believe it is) too, which will give you a mix of buildings from both sets.
I don't see these NewGRF's in the ingame BaNaNaS, in fact i'm using quite latest nightlies. Is this due to the game itself or due to the NewGRF requirement ?
The new 1.6 files arent shown in openttd 1.3.1 content download, I had to download manually and extract it myself to work it. Maybe because they are not just .tar but tar.gz ??
a) NewGRF requirements are minimum game version v1.2.3 (except CanRail, it requires v1.3.0) or higher, including any nightlies, beta's and RCs.
b) GRFs are supposed to be downloadable from the Content Downloader within games with OpenTTD versions v1.2.3 through to and including v1.3.1 (CanRail v1.3.0 - v1.3.1). However, there is still this bug, that downloads are not available from the OpenTTD version that is specified as "Maximum OpenTTD Version", only from the immediately lower one; i.e. v1.3.0.
Players not using stable versions (as indicated above) or v1.3.1 need to do what slaca
did; go to http://bananas.openttd.org/en/newgrf/
and download it from the link(s) in the 'Downloads' column. Then, unzip the .gz and place the .tar file into your 'newgrf' or whatever folder you are using. The same applies for TTDPatch players for the time being.
There is a reason why Canadian Graphic Files are not available for download from within OpenTTD nightlies, beta's and RC's, but they work nonetheless with those releases.
A better solution is being worked on ...