A SUSPICIOUS looking package was delivered to the Keeping Posted cubicle yesterday. Toying between opening it up ourselves or calling the Bomb Squad, we allowed our usual curiosity to override caution and open it we did. What a surprise. Inside we found everything you could ask for to get through a warm summer's day lolling on the beach - Pepsi six-pack, Haagen-Dazs ice cream, shades, CDs, suntan lotion, beach towel - the lot. Planning to spend the day out and about instead? No problem - for the goodies included tickets to the Hongkong Ballet, vouchers to lunch at Il Tarfuto and even an Adidas sports coupon to keep you comfortable on your feet. It turned out to be FM Select's ''Summer Survival Kit'', which is being given out to listeners who call the station and answer a simple question on air. And word has it that next Friday they will be giving out a bumper kit that even includes a computer. Wonder whether Metro boss Craig Quick, sunning himself on a Hawaii beach, has one alongside him?