well, it helps

you read Joomla documentation. Find section installing components and how to add new menu item to frontpage. If you figure out how to add default menu item pointing to component you can experiment with URL menu link.
Examples of URL links to blastchat client:
Load client with parameters defined in admin backend for BlastChat component
| Code: |
http://www.yourwebsite.com/index.php?option=com_blastchatc
|
Load client with parameters defined in admin backend for BlastChat component, owerwrite detached option
Undetached
| Code: |
http://www.yourwebsite.com/index.php?option=com_blastchatc&d=0
|
Detached (if user has pop-up windows blocked, he will get option on screen to load chat Undetached
| Code: |
http://www.yourwebsite.com/index.php?option=com_blastchatc&d=1
|
Load client with parameters defined in admin backend for BlastChat component, but force to go to room with id
| Code: |
http://www.yourwebsite.com/index.php?option=com_blastchatc&rid=123
|