Dang, I've been searching for a while, before I post this, I can't find anything.
EDIT:
Do I just do this?
How to set up Yahoo! IMAP email (non-root solution)
This does not require Yahoo! Plus Mail, the paid service of Yahoo! mail.
1. From the home screen, pull up the applications tab (at the bottom of the screen)
2. Touch Email
3. Touch Manual Setup at the bottom left corner
- Select the IMAP option
4. In the incoming server settings, enter the details as follows:
Username:
[email protected] (enter your complete yahoo email address)
Password: enter your yahoo password
IMAP Server: imap.mail.yahoo.com
Port: 143
Security Type: None
IMAP Path Prefix: leave blank
5. Touch next to continue to SMTP Server Settings and enter the details as follows:
SMTP: smtp.mobile.mail.yahoo.com
Port: 587
Security Type: None (Checkmark ***8220;required sign-in***8221

Username:
[email protected] (enter your complete yahoo email address again)
Password: enter your yahoo email password again
6. Touch Next
7. Fill out your personal information (Name etc.)
(If you are having problems be sure that WiFi is OFF then try again)