Tool to combine/reduce the number of parts?

[Michael Horvath]

I am creating a large mosaic image. Unfortunately, the largest plate in MLCAD's generator is 2x4, and the largest in LDDMC is 2x2. So this large mosaic has many many small parts. Is there a tool that can, say, combine two 2x4 plates to create one 4x4 plate, etc.? Thank you.

Mike