That's easy. Get a bluray player with RGB scart, set the scart output to RGB, plug it in to the PJ and enjoy the best picture you can get on a 350. Seeeemples!
Edit:-
I don't think you'd be posting about this if it was quite that simple. I'm assuming now that your BD player does not have a scart socket. Is that correct? If not tell us what BD player you've got and we can let you know what the best course of action is.
Edit 2:
Ok, bored of waiting and already got the answer for you. No scart on BD player? No problem. This is the best way to do it if you have no component input on the 350 (the 320 with component input is sometimes mislabeled as a 350).
Use HDMI (set to 576i)
plug it into a HDfury 2 :
http://dme.ghost2.net/hdfury/home.php?SID=53&deflang=en
Buy one of these vga->5bnc cables :
http://shop.ebay.co.uk/?_from=R40&_t...All-Categories
Plug the Vga end into the HDfury2 and the 5 bnc's into the back of the PJ.
Voila.
PS. Don't even bother trying to plug a BD player's composite out into the seleco's scart socket. Composite output is inherently crap (same goes for SVGA to a lesser extent). You'd be better off with RGB scart from a regular DVD player.
pps. You might be thinking, "Hey I just wanted to plug it in. I don't want to buy any converter gizmo's". Tough titties, amigo. That SD seleco with it's big screen needs all the help it can get. Do it and it will blow the best picture you've seen on it from DVD into tiny little pieces. Next time buy a BD player with outputs that fit your PJ.