3.1.2 > 4.0.1 unlocked 3gs using spirit

[sean1604]

3.1.2 > 4.0.1 unlocked 3gs using spirit
Wondering how to make this jump, my modem firmware is 05.11.07.
I have blobs saved on cydia right up to 4.0.1 from 3.1.2. My real question as I know I have to use cydia's host to sign it is if I go up to 4.0/4.0.1 will I be able to get an untethered jailbreak/unlock? If not I might just stay put.
Thanks for any help!

 

[theringer]

If you have the shsh for 4.0.1 just do a clean install of 4.0.1 and then jailbreakme.com