You will need to write your own deployment script, but this can be very easy with the features in WebSphere...
In WebSphere v6.1, v7.0, and v8.0 there is an administrative option that allows one to log all administrative commands to a log file. Enable this setting and then grab the log contents and this will give you the install command. Here's a link to some information on it in the inforcenter (
publib.boulder.ibm.com/infocenter/wasinf...)
In WebSphere v8.0, there is the concept of a monitored directory deployment than can be used for non-production environments. Here is a link to the IBM Education Assistant portal discussing this (
publib.boulder.ibm.com/infocenter/ieduas...)
Both the InfoCenter and the Education Assistant Portal are great resources.
There are also numerous third party products for sale that would be able to assist you in automating deployments to WebSphere.