You can replace just the fop2_server binary, The beta for debian is:
http://www.fop2.com/downloads/fop2_server_etch32
or
http://www.fop2.com/downloads/fop2_server_etch64
This two will work also on lenny and ubuntu systems.
So, just donwload the complete beta (fop2.tgz) and the binary for your platform and rename/replace the fop2_server file.
Best regards,
