I install Spark Instant Messenger for the first time (i used to be use Pidgin for instant messenger but since has no facility for sending message to group, i decide to change with spark).
I have confusion with setting yahoo and google account but i can setup with our local server.
Spark is not a multi-protocol messenger like Pidgin or Miranda. It only supports jabber/xmpp out of the box. But you can use transports to connect to other networks. If you are using Openfire server, then you can install IM Gateway plugin on that server and enable Yahoo transport. Then you will see Yahoo icon on the Saprk toolbar and will be able to connect to your Yahoo account via Spark.