Yes, it is of course possible. But there are a great many differences between 6.0 and 11.2 so it is not typically just a simple upgrade. You need to consider the many changes between thsoe releases to see hwo they may impact your application, operational procedures etc. There is a whitepaper that discusses upgrading from 7.0 to 11.2 and most of the details in there apply to 6.0 as well (though you would have to also consider the differences between 6.0 and 7.0). If you can provide me with a means to contact you I can send you the paper.