LOL you are a bit confused...
The Bootstrapper is what is used to flash the ROMS.
CWM has one in the Rom Manager and another one specifically for the D2 in the market.
Search for Droid2 rcovery, you will find the one I'm talking about.
It's a paid product though.
But then again so is RM.
The 2nd Init is a trick that is implemented AFTER the bootstrapper has installed CM7.
Basically 1st Init runs off of read only memory so it can't be edited. 2nd Init hijacks and takes control of the first Init, Creates a new shadow drive (Semi-Copy of the Boot folder) with edited boot parameters, kills any proccesses the 1st Init may have run, and then uses the shadow drive (with custom boot sequence) to boot into system.
It is basically nothing more than a way to make a clean 1 PID (program ID) system to boot that uses a customizable shadow of a normal Init boot folder.
We can't edit the actual Init boot folder so we make a temporary one in RAM and boot from that which means we can edit and change the files run at boot.
You seem to be confusing the two.
The Bootstrapper really doesn't do much but give you an opportunity to flash files onto the phone at first boot. It does not really change the boot proccess, just interupts it enough to make a choice. This is why root is required to run one since you need to be able to write as root in order to flash the ROM.
Now that said, CM7 has recovery built into it!
So you really only need the Recovery (bootstrapper) to flash CM7 for the first time.
Once it's flashed in you no longer need to install any bootstrapper!
Just hold down the power button and select recovery.
Did that help at all?