i know people may disagree but here is my advice i have 3 boys when the third was born my eldest was 3 and my second 16 months and a new born.
i tried to potty train my eldest at 2 did not work so i left it until the summer of his third birthday and he basically did it all himself so i followed the same pattern with the other 2 and they did it themselves. boys are not as mature (bodily) as girls so i would leave it until the next year,
by waiting until all the boys where 3 they did night and day at the same time and i never get any wet beds.
ignore peole who say they potty trained their kids very early (thats nice for them)
and if its pressure because of nursery etc explain to them. put the little one in pullups because they usually toilet groups of kiddies at the nursery anyway and they know about toilet accidents and again dont worry what other people say.
on to your other baby i got a westie 18 months ago and crate trained him for 3 weeks.(puppies dont let messing in their own beds.
i let him out to go in the garden then if he didnt toilet i would not leave him unatended in the house if i had chores to do i would pop him in his crate.
if i saw him messing then i would shout no but if he messes and your not there dont tell him off.
another thing is to get loads of news paper and when you see him wee rub the news paper in it and put it e.g by the back door or conservatory and that is where he will do his wee,s as his scent is allready on there.
a great site for advice on puppies is
www.champdogs.co.uk
hope this helps