add more prefix for forum - customize prefix - repost

hello,i need to create extra thread prefix for vbulletin 4.2 version forum only. when user create a new thread : have : [login to view URL] : Want To Sell - Want To Buy - Want To Trade (radio Button) Title : (text Box) (vb default) [login to view URL] : New - Second (Radio Button) [login to view URL] : USD (text Box) Description : (vb default) [login to view URL] payment Methods: paypal - Bank Transfer - MoneyBooker - Google Checkout (radio button) [login to view URL] : (drop down menu) [login to view URL] : (Text Box+radio Button) Example for shipping : u need extra ship? (yes) (no) if YES : Free Sheeping [x] [ text box ] Location : [ text box ] [ price ] user able to create more location.. [login to view URL] method Upload Image ------------ this prefix module for additional prefix thread..the module (prefix) only available in marketplace category... its look like forum permission to enable this prefix