Basically I installed Simpleportal mod pack and I want to know to change the welcome message.
As usual, MOD support questions should be handled in the respective support topic.
Or, in this case, you can even use their dedicated site www.simpleportal.net
Welcome message as in the default message on the portal?
Easy, admin>simpleportal>blocks and I believe it's called a news block or something
Just click on modify and yeah, you should be able to change it.