help using playstation store

i need some help acessing the old ps1 games. I've seen on here that you can download the old games from the store and play them on the ps3. Can anybody tell me how to do this. 

Thanks

Cross Media Bar

It's the main screen when you turn the PS3 on.

If your british like me then they won't be there. Our PSN store is rubbish, us english always get the short strawspark5050

[QUOTE="spark5050"]If your british like me then they won't be there. Our PSN store is rubbish, us english always get the short strawtimmotool

you can but you need to add the funds in a weird way...i think you can only add like amounts less than $40 at a time so it doesn't check the address of the credit card.  Not sure on all the details.