Hi Sid:
I have taken many photos of IP swim platforms, and I have uploaded some to the link below. There are two companies that owners have used:
KatoMarine.com and
www.beachfiber.com/
The KatoMarine platforms are SS and Teak. The SS frame is through bolted onto the stern with access to these bolts behind the water heater, the sail locker, and the stern bilge area. If I were doing this I would cut an access panel in the back of the qtr berth wall next to the water heater access. This makes access to the stern easy.
The BeachFiber one is fiberglass and looks nice also. This one also bolts on but with a simply L bracket. This one has a nice ladder under the platform.
Here are the photos I uploaded:
picasaweb.google.com/HaydenCochran/IPSwimPlatforms#
Here is a photo of an IP40 with a KatoMarine platform: