Partioning HDD

Hi theres

I am quite new to solaris, I have 40GB HDD in which I have created only 10 GB partition & installed solaris 10. Now I want to add another 10GB from remaining 30GB space. I tried this with format utility but I get stuck after I create fdsik partition. After creating this I cant recognise newly created slice & which slice/partition to format or newfs. Can anybody help me out or suggest steps to follow after creating fdisk partition in same HDD.

Regards
Roy

Detailed steps posted here