pier persistency not working right for me

Hi, Yesterday I had a chain of bad things with my pier image (on production). First, I learned the bad way that uploafing a 16M file is a bad idea :(... it hangs my application, maybe not for a problem on pier but my hosting provider... and very stupid I, that image is the only one who does not have a VNC server running there so I cannot see what was happening. So I tried to start a backup... and there is the problem: last backup image is from Dec 5 :( I have a simple image persistence configured there... so I thought I should have at least one image a day... :( :( Well, transactions.txt is full of transactions, but I don't know how to use it for restablish my pier image... what I need to do? Thanks in advance, Esteban pd: of course, right now I'm installing it a VNC server and a few more things to ensure this will not happen again -at least, it will not catch me so nude :)