I see, you did the right thing then
More questions:
Which recovery are you using?
Did you verify the file size with Chris to make sure you got a complete download?
So you are on what ROM right now?
There's one other stab-you may/might/possibly need to ensure you got ALL the 1.47 OTA files (not just radio and wimax).
Chris may have gotten those for you, I dunno, but when you re-rooted you most likely lost those. OMJ recommends having them before flashing his Froyo ROM.
I would go to OMJ's thread and go to Post #2. DL and install the v1.7 ROM1 update (PC36IMG format) then flash OMJ's Froyo ROM.
You should verify that you are nand unlocked first-load bootloader by power off then back on while holding Vol Down. If hboot doesnt say .76.2 then you are not "fully" rooted, if it does then you can flash that PC36IMG file of OMJ's (just to verify since you re-rooted)
If that works you should be able to jump back to Sprint Lovers without a problem.
If you want to reformat your card (still think it's a reach) then:
Backup your card onto your PC.
Reformat it with fats32.
Reboot with the blank card and let the device prep it.
Dont put anything but the ROM files back on the card.
Try the flash then.