moving cured decals

I'm working on a Tamiya ZX-rr gp bike at the moment and didn't realise I miss aligned a large decal til after it had cured. Is there a way of lifting the decal for realignment without demaging it. I've tried soaking the part in water over night to no avail don't want to leave it for to long incase the water gets under the paint. any help is muchly appreciated.
Thanks Trent.

Take a look at this webpage
http://www.briansmodelcars.com/tutorials/tutorial/110

It has a section about moving dried decals although it seems you have already tried something similar.

Maybe one of the decal setting solutions would soften it again but it sounds to me like you're stuck with what you have done. You may end up damaging the decals, unless you can get another set.

thanks tezza, just tried some microscale micro set, even written on the label to remove decals,lol. Any way managed to move it the 2mm needed for it to sit right. will have to post some pics of it soon.