If you want to get rid of the 100mb partition and use the Windows 7 partition as system , that's easy enough.
To add a winre scancode at bootup:
Create a folder on another partition (e.g. D) called Recovery, create another folder inside called Winre (you now have D:\Recovery\Winre )
Copy the winre.wim and boot.sdi from hidden Recovery folder on windows partition (e.g. C:\Recovery ) , into D:\Recovery\Winre folder. (You now have D:\Recovery\Winre\ containing winre.wim and boot.sdi )
[I usually take the s and h attribs off them - It might not be necessary]
Open an elevated cmd and type:
C:\windows\system32\reagentc.exe /setreimage /Path D:\Recovery\WinRe\ /Target C:\windows /Bootkey 4300
Restart pc - tap F9 to boot winre.
You can replace the standard winre with your own - just rename your .wim to winre.wim and put it in D:\Recovery\Winre folder instead of the standard one.
You can use a different scancode if you like - I use F9 .