Method 1 - If you're UTAU is not in the UTAU folder in your program files....
- Open UTAU
- "Tools"--> "Options..." --> Second Tab (Bank Register)
- Press "select" and look for you're UTAU's voice bank folder on your computer
- Select and open "a" (it can be in romaji or hiragana)
- Set the name if it hasn't been already
- Press Add (they will now show up in the bank reg. list)
- To assign them as the current singer, select their name and press set-->OK
- They should be the current singer. If not, try method 2 after doing this method...
Method 2 -If you're UTAU is in the UTAU folder in your program files or already set.....
- Open UTAU
- File-->New
- Under the "Voice Bank" drop down list, select your UTAU
- Press OK
- Make them sing!
I hope this clears things up!