I don't have JackFlash, so I haven't tested it with Plucker, but I've just fixed a bug (or three of them!) that was preventing Plucker from running in ROM. Now it runs from ROM in Pose at least. If you feel adventurous (and have made a backup, etc.) you can try it. Get a CVS snapshot build of Plucker 1.5 from http://www.plkr.org/index.plkr?a=snaps
. Make sure the datestamp on the snapshot is at least 10 am on Sunday (the snapshot builds are made hourly, so my changes will only show up in about half an hour). Let me know how it works for you.
For my shareware (FontSmoother, myKbd, mySkin, Accenter, FastLaunch and AtomClock) and freeware PalmOS software, go here: http://pruss.mobi