whenever i try to run MshEx i get half way through the process and i get this error and it crashes "trying to allocate 131095257 bytes" ive re tryed mshex but still the same error.... any ideas?

What are your export settings for Crosswalk?

heres my explorer all under one null like the tut said then i select all and center click the null then i hit crosswalk and did 6.0 text then heres my settings i used then this is the error i get when i try to use mshex so idk wat i did wrong i followed every step

Export as Wavefront OBJ then import that back into XSI. Follow directions as you did from there.

131095257 bytes = 125mb which is ridiculously too big.

Right, delete some of the useless corners/edges, or get someone with an XSI exporter full version to do it(which may overload too though, and for ur ref don't ask me cus I don't have an exporter)

And I am not sure if MshEx can handle vehicles(unless that car is a prop)

Also, rename the "null" to "Dummyroot"

converted models wont work well in battlefornt because they have far too many unnecassery polygons

it doenst matter how you call the DummyRoot

you can export everything except enveloping and bones via meshex