Sorry guys, but I don't recall there being any problem with transferring frames. They are all the same (except the VIN sticker/number). It is what is bolted up to it that makes them different.
You have a functioning 98 Valk (model?) and a written off IS? I went through this when I wrecked my IS back in 2010. If all you have damaged is the frame, nothing else broken, and that is the cross member, there is a fix for it, and it's been posted. Fix the IS, and continue driving it.
Hopefully someone posts the link to the fix.
Found it!
http://bigbf.com/bigbf_shop/crossmember_damaged/Seems it was BigBF who posted and did the job. Check with him for a price.
I looked earlier this year, and where they used to not give titles with bike frames that have been parted out, I've seen them with titles for as little as a few 100's $. If I didn't need a whole new front end at the time, I would have bought a new frame for $1500 and moved all the parts over.