is there a mod to make lots bigger than 64x64 out there? if not can someone create one?
In short, no.
Due to the way how the properties are defined, there's a restriction that a lot can contain a maximum of 1,280 items.
Those items include the building, props, flora, base textures, overlay textures, TE tiles, water tiles and land tiles.
Since 64×64 tiles would require no less than 4,096 base textures, that is already too big a size for a lot.
what about something like 120 x 2... for a lot of multiple billboards... i don't really need 64 x 64 more like what i said 120 x 2
^ Why not making a set of 1x2 lots instead of one large lot of 120 x 2. Seriously, I don't see the point. Why would you need such a large lot? The only thing that may require long lots are airport runways, but since a lot size can be 64 x 64 max, this is not going to happen...