It doesn't sound like everything in the tutorial I wrote will apply to you in this case, however some of it may be of interest: http://www.fotomozaic.ro/ (look under Ultimele Tutoriale tab)
If you or anyone here needs some Canada balsam, please let me know. You can dissolve it with several different types of solvents. You can also use a clear/high grade rosin if you need to...it will have about the same optical properties, actually.
Jon