Yet another noobish question...

Hi again,

I ran into a problem today... I tried flashing the router with Oleg's custom firmware and after that I could not access the mainpage anymore... The router answered to pings though. Also, I could not ftp into it...
I managed to solve the problem in a different way. I played with Asus' firmware updater utility and after that...surprise, I could again log in BUT it is the old firmware, the one the router came with...
I'm quite familiar with the flashin procedure, but this time I had no luck
That is why I was wondering if there's a step-by-step procedure to successfully flash the router. Do I have to use the Asus util that came on the cd?
Any help would be appreciated! Thanks in advance!