I copied and pasted to notepad so I could refer as I wrote . . . . will try and not be my longwinded self, but your question CAN NOT be answered intelligently AND quickly. Good basic questions! Wish everyone asked them before "proceeding with the onslaught."
1. Have you USED JackSprat at all yet? If not, the first thing you'll want to do is MAKE A LIST, as you're doing (good lad!) of what you want to get rid of and what you want to keep. JackSprat, if you ask me, works best if you do "all the demolishing" in one sweep, take a breath and you're done with it. Re-using it and "adding more free space to the initialized flash" has caused me no problems, but can't be "guaranteed." More on the "app list" later. When you've decided,
2. Install both apps and register, MAKE backup to SD Card (easier and cleaner than desktop if you ask me) and uninstall the EXTRA LANGUAGES FIRST. After that, delete apps you don't want and RealOne is DEFINTELY deletable. You can MOST LIKELY put any player in its place using JackFlash. I would not NOT uninstall any core apps like contacts, datebook, to do - even if yo have Agendus. NO WAY. I got rid of Notepad because I use TealPaint, but I wouldn't recommend that because you don't "save" that much. You can dump older version of Kinoma (replace with newer version), Quicktour, SplashScreen (speeds up soft resets a lot!), Welcome & Calculator (provided you have a better one, which isn't hard). Since I don't use mine as a phone or for the web, I also deleted SMS, SMS support, VersaMail, Modem Support, Phone Link, Phone Support & Dialer. Also got rid of that awful "photos" thing that was bundled with my T3.
3. Then with JackFlash, INITIALIZE the flash. Immediately put JACK SAFE in flash.
4. Move apps out of RAM and into Flash one at a time. Multiples are allowed and probably fine, but I have never done more than 2-3 at a time. PLACE APPS IN FLASH in the ORDER they might be updated, as updating requires pulling them back into RAM, updating, and moving back to flash. Lots of this causes fragmentation - which is fine - JackFlash will "compact the flash" for you. I just don't like that happening more often than necessary. Freewares you love, for example, that are older "keepers" could go first. Apps that are check-mark enabled should be DISABLED before moving.
5. Agendus works great in flash for me, some have had problems. You may have to reset color preferences and icons "pre-assigned" to meeting and to do categories, and make sure you hit "apply" a couple of times. Sometimes they don't "stick" but will if done twice (usually not necessary). DO NOT MOVE ICONS TO FLASH or any Agendus databases - in fact, don't move ANY databases to flash -- they won't work. ONLY prc's should be moved.
Languages alone should give you around 4MB. With all the deletions I did (plus delete OLD Docs2Go an Docs2Go extras, and then reinstall ONLY Sheet to Go and needed libraries) I ended up with 10.5MB free. I'm running 50 apps and 5 libraries (libraries for reference only, like AES security/encrypt library, are okay in flash) and still have 2700k of flash left and 95% free of RAM on the T3.
As long as you INSTALLED JACKSAFE first off (you can't add later after adding apps - you have to "back them out," install JackSafe, and start over!) - you're protected from a HARD RESET. The apps in flash would come back.