Originally Posted by prj

Couple things...before I decide to move forward

1.) Can I make multiple nandroid backups on my SD card of all the different ROMS I have and install on my phone?...i.e. Kaos, Tazz, Nonsensikal etc.

Absolutely...you are only limited by the amount of space on your /sdcard. Some users also carefully rename their Nandroid backup folders (not using spaces, by the way), to indicate what the backup contains.

2.)If the answer to question 1 is yes, can I re-flash any of the ROM's at anytime?

If you mean restore the Nandroid backups, yes, you can freely restore a Nandroid backup without having to do any wipes. You only have to do wipes when you flash a new ROM or "update.zip"-type file.

3.) If the answer to question 2 is yes does that then mean I re-flash back to the stock HTC sense ROM that I backed up onto an SDcard understanding that it will be rooted but nobody would really know unless I told them?

Except for the fact that you've still got Amon_RA's custom recovery partition installed (I mentioned this in my first reply to you last night ).

And lastly...

What the he** is a Nandroid?

I think in the context you might be asking it is the Android backup of the NAND (http://en.wikipedia.org/wiki/Flash_memory) flash memory on your phone.

What the he** is a dalvik-cache?

Davlik-cache is the pre-compiled (by the Dalvik virtual machine), optimized bytecode for your application. Having these in cache saves from having to do this dynamically each time you want to run the app. Wiping Davlik-cache forces Android to rebuild the cache before finishing your boot sequence. Sometimes this is necessary for different versions of Android (i.e., I think going from 2.1 to 2.2 would require rebuilding the cache entries).