I already asked that question to HiTech after posting that request here serveral times, the answer was a simple 'no'. May be all the textures in the texture cache need to be the same size. If this is not the case and several textures resolutions can work together, then the cache may be managed as follows:
1 - a big precached segment with all the textures for every vehicle/plane using the pre-selected texture resolution, for example, all to 256x256.
2 - a reserved segment for own plane/vehiche that would be filled dinamically when your plane/vehicle spanws with the texture resolution pre-selected for own plane/vehicle.
Personally, I dont care about the text quality of any plane except own plane. A moving target at 200 yards seems the same with unlimited, 512x512 or 256x256 textures.