SPPC Customization

I have installed the follwing contributions. Sppc - 4.2.2 Member approval show pricelist for sppc 4.1.1 (but it is working on SPPC 4.2.2 also Multiple Images 1) should be able to enter (from the Admin) the MRP (manufacturer Suggested retail Price Printed on the package) --- It Should Show as a separate column in the product Listing and Also 2) should be able to enter (From the admin) our price (Which is my regular selling Price) --- 3) I should be able to enter (From the admin) Group Prices. Now , If I have not Entered the SPPC for a particular product , then My Regular price and the MRP Should Be Displayed . But If I have entered a SPPC for a Product then the SPPC rate and the MRP Should Be Displayed. Currently What is Happening is if i have not entered the SPPC Price for a product then it Displays 0 as price for a customer who is in SPPC Group. I would like to show my regular selling price and MRP in case i have not entered sppc for a particular product. Please advice .