cgi call + background calculation + php post

Hi, I need a short php script that will do the following in the background when my php site loads up: Step 1. Check currency rate here: [login to view URL] Step 2. Calculate the exact USD value based on the current currency rate for 4990HUF Step 3. Pass the result into an outgoing url after the "vp" parameter: [login to view URL];p=123puppy&v=0&d=0&q=1&vp=9.99 whereas instead of the 9.99 the actual current USD value is written based on the STEP 2. results! Fast and perfect job needed! Waiting for the bids Andrew