A new boiler is one of those things which should be installed by someone who is certified, licensed, and experienced mostly so you know the job is done properly and if there are any issues later the installer will be accountable.
The best way for your cat to get used of your home is to just allow it to explore and walk around. Do not follow the cat. If you have stairs in your home it may be a little more difficult because...
it depends: are you being rewarded? if so:yes;) show it off to the world you awesome:DDare you being interrogated? if so:maybe, it depends on the sitiation. are you being hunted down? if so:why are...
I think she should use her married name out of respect for her other half. But if things were not good with him, use her own name and start a new life.