Quick question on "reflashing" a ROM...

[lifeuw19]

So, a few months back, I flashed my first cooked ROM. I went with NRGs 29005, dated Dec 13th. I've had some issues as of late and am going to hard reset and start things from scratch. My memory is terrible. I was sitting with under 6 MB of free storage... freezing up all the time. So I happened to notice he has a new rom out, dated Mar 21, so I thought I'd just flash that one instead. But I've been reading where I need to flash back to a sprint stock ROM before doing so. Is this necessary, going from one NRG to another NRG?

If so... where can I find the stock sprint ROM and how do I go about doing so? Just point me in the direction and I'll figure it out... I followed these directions last time and had no issues... can I simply do this again?

Thanks... want to still do this tonight... I can't even receive/send texts, or answer calls at this point.