www.barebones.com/products/textwrangler/... more easily edit large poser/text files on a Mac, excellent freeware.

http://www.daz3d.com/shop/injection-pose-builder-1-5 ... runs on a mac in classic mode (although Mac abandoned classic after tiger 10.4.11)...works well.

http://www.renderosity.com/mod/bcs/index.php?ViewProduct=94573... combination merchant resource and 60 page pdf tutorial on all aspects of INJ/REM creation. on sale for $8.00. Recommended.

http://www.runtimedna.com/Advanced-Figure-Randomizer-and-INJ-Builder.html... very cool poser python scripts by semidieu... thorough documentation, poser 6 and up, Mac compatible. All of Semidieu's products are terrific.

Oh yeah, anything by PhilC is worth a look at... You should visit his site and check out some of his things if your looking to extend the functionality of poser and your own content creation.