Help with changing the PSP Waves

I got the files for changing the psp waves with a friend, but I'm a total flash noob...
How can I do this change?
Is it hard?
Is it complicated?
If someone is willing to help me, please, send me emails or post here, I'll come back and check for a while.
(email: [email protected])

No ones going to email you, I don't know why people must insist that.

Your psp must be on custom firmware, 3.40 OE-A preferably.

Ok, my psp is a 3.40 OE-A.