If you have FSX, install it into there, then move everything over to FSX-SE.

I intend to write how I got the 737 to work in FSX-SE, but I still have FSX installed as well, so that might make a difference.

The how to will be done on, or after, Boxing Day, depending on if we have our traditional family get together on that day. The weather forecast doesn't look promising, so we might postpone it until another fine day. ;)