and for the postbit (the first image) is easy you need to go to Admincp/vBulletin Options, the search in Style Options and find Postbit/Postbit Legacy you will specify the postbit legacy option to look like you want, for the other just search that phrase and add a <br /> to split that phrase
example: Welcome To Forums $vboptions[bbtitle] You Will Need To Accept The Rules To Proceed With Your Registration
You Will Change To
Welcome To Forums $vboptions[bbtitle] You Will Need To Accept The Rules <br />
To Proceed With Your Registration
and it will look like this
Welcome To Forums BlaBlaBlaBla You Will Need To Accept The Rules
To Proceed With Your Registration