As for valo crashing, the main trouble are badly scripted cars i mean Vt_java non being done, car models java and chassis itself, plus there might be a possible crash in valo due traffic shadow file, you can find it in cars/traffic/textures a file called kocsiarnyek.dds and delete it.
There's a Tutorial on gom how to fix unfinished cars(the scripts i mean) Tutorial Linky
Hope it helps.