Yet another boot question

[doug]

My is simpler than booting the "monster"

I had to replace my workstation. It was supposed to come with windows 7 that I 
was going to toss. As it came with 10 I shrunk the windows partition and 
installed 10.3. Getting:

=>        63  3907029105    ada0  MBR  (1.8T)
           63        1985        - free -  (993K)
         2048      204800       1  ntfs  (100M)
       206848   833284096       2  ntfs  (397G)
    833490944           1        - free -  (512B)
    833490945  3070230471       4  freebsd  [active]  (1.4T)
   3903721416     1769528        - free -  (864M)
   3905490944     1536000       3  !39  (750M)
   3907026944        2224        - free -  (1.1M)

=>         0  3070230471  ada0s4  BSD  (1.4T)
            0     6291456       1  freebsd-ufs  (3.0G)
      6291456     8388608       2  freebsd-swap  (4.0G)
     14680064    41943040       4  freebsd-ufs  (20G)
     56623104    83886080       5  freebsd-ufs  (40G)
    140509184  2929721286       6  freebsd-ufs  (1.4T)
   3070230470           1        - free -  (512B)

The FBSD install overwrote the MBR to boot the BSD partition. Can I [easily] get 
a duel boot out of this. Or, is there a better way to install FBSD as not to 
wipe out what's there?