Hi Barbara
I think once you have made the decision to put him in a big bed,you have to stick with it.
I would have a bed guard on the side,just to reassure him.
Also,you may have to wait for a while in his room while he settles down to sleep,maybe even a couple
of weeks
Then after that you can try jsut putting him back to bed again and again until he does it on his own.
It's a long process but it will work,just try not to put him back in the crib as he'll want this everynight.
Also,you really need to get Lane out of the bassinette,the mattress really doesn't give enough support.
Hope you get on ok.Just keep us posted.