The config I'll be releasing in a few weeks, (looking like late January if groove is down to help optimize vhuds and scripts ;] ) is entirely 2048 textures with a few sacrifices to save memory allocation.
It currently crashes after each map and requires a reload of tribes, but again it hasn't been optimized yet and is also using altimors version of skybox which is notorious for crashing due to poor memory allocation. Also, anything higher than 128x128 for terrain will crash in conjunction with these assets
I am hoping mj will make a usable version of skybox that models default sky memory allocation
<3