[Discuss] [vlug] can I append multi line in a file with sed ?

[J.Bakshi]

Hello list,

I need to modify some bulk file where I have to add 2 additional
lines. Say the files have a specific line

<my address>

and I have to modify all the files like

<my name>
<space character>
<my roll>
<space character>
<my address>

sed has the character replacement option but how can I utilize sed to
resolve this issue or is it although  possible with sed ?

Any suggestion/hint is most welcome.
Thanks