Is it possible to transfer the shieldwall or schiltrom formations into RTW from BI, without having to go through the -mod command line?

Also, which file deals with things like unit spacing in the formations?

I'd like to add shieldwall to RTW and do a little modding of some of its aspects to make it fit in with RTW, since short_pike doesn't work.

I've found it makes a really nice hoplite phalanx if you use overhand spears -no spearbutts in anyone's eyeball or anything! Other than the boys' tendency to keep scurrying back into formation, which might be fixed by spacing out the units more, it looks almost authentic, much better than the pike-style phalanx. But when I use BI and the -mod command: no movies, slower performance (not much but I notice it), etc. If there's a more direct way of doing it that I could run RTW by itself by transferring files or the BI.exe...?

Or maybe the reverse; load certain RTW files into BI? I'm not much of a BI player anyway.