One can use jdk1.5 java-agents to bootstrap instrumentation
process. 
Here is a samples that show how one can use this feature

> java -classpath .:build/jiapi/lib/jiapi.jar:build/classes/:lib/log4j-1.2.8.jar -javaagent:build/jiapi/lib/jiapi.jar=ir=*Foo*,resolution=*println*,dump samples.Foo

where
	ir=*Foo*	means using inclusion rule *Foo*, which instruments
			all the classes, that has 'Foo' somewhere in its
			fully qualified name
	resolution=*println* means instrument for method invocations
			that call println methods of any object/class
	dump		means that dump instrumented class into
			working directory.

One can give multiple -javaagent switches in command line, thus
providing different instrumentation strategies.