Do you *need* to move her right now?
I ask because there may well come a time in the next 6 months or so where she is happy to move and if you wait, it will be much easier. No guarantees or antything, you understand. With my DS i stressed about it and tried and tried (and slept on a matress on teh floor with him for ages) adn by 2 he was happily sleeping in his own bed, alone, with no fuss at all. He was just ready.
So this time I've planned for it and DH has to sleep elsewhere - sorry mate - and DD will move when she's ready.

Otherwise, you can try cot side-car style and/or mattress on the floor, with a more gradual transition to the move away. Relocating to her room for a while might also help.
Good luck!