Chessmaster1000: Nope, white can't castle.

This position doesn't meet one of the requirements for castling:

Unattacked: All of the squares between the king's initial and final squares (including the initial and final squares) must not be under attack by any opposing piece.

Check FRCEC's Castling Page with rules and examples at:
http://frcec.chess960.info/FRC-Castling.htm

Now, your question has given me an idea! In our Castling page we only provide examples of positions where castling is legal.

I'm going to add a section of positions where castling is illegal! and I'll start with your example.

Thanks for the idea!

Jose Carrillo-Muniz
FRCEC Moderator
http://frcec.chess960.info/