How to create a Myriad vanity address

Download vanitygen from here: https://en.bitcoin.it/wiki/Vanitygen
run:
vanitygen -X 50 <prefix>
where <prefix> is an address you are interested in. They must start with "M" and the second character can be between 7-9 and A-X (not capitol I or O, as those are not base58)

An example:

vanitygen -X 50 -i Mcrypt

ran for a while, and gave me my new address of:

Address: MCrypTZRTRk8RGjSt3MZ3atSEwSLPicePR
Privkey: <the_private_key>

You can then import that address into myriadcoin-qt from the console with:

importprivkey <the_private_key>