Here is the tool i created for injecting byte data directly into the class file for my 2007 entry.
It reduces the overhead that embedding data as a Hexadecimal String in the source creates.
The tool creates a new Attribute in which the data is embedded. This Attribute is then injected at an valid point into the class file.
Feel free to use it or modify it just let me know if it is useful or if you make beneficial changes
p.s. the source is not very well commented, read at your own peril