Play with external without using disc

Hello all.

i jailbroke my ps3 with this guide:
http://www.ps3hax.net/showthread.php?t=26677

But my question is pretty simple, is it possible to load games from an external HDD without any dvd/cd etc in the blueray device in the PS3? if yes, how do i do it because i messed around with all this for like 4 hours now and i can't find a solution.


Regards
Jediper