Finding and Referencing between sheets

Hi, I need to figure out how to find a value in a sheet and reference values from the row that value is in onto another sheet.
I'm trying to make an automated invoice sheet where all the info about the sale is put into the first sheet as a log and on the second sheet you need to fill out the item number feild and the rest of it will be automatically filled in by referencing info from the first sheet.

Basically each feild that needs to be automatically filled in on sheet 2 searches the A coloum from sheet 1 for the Item # (that has to be manually put into sheet 2) and references information from that row.

I know what i mean, but just incase ive confused anyone with my bad explaination of what im after, i made a quick excel book that will make it easier to understand (hopefully)
http://coronac.zoomshare.com/files/Referencing_between_sheets.xlsx

Thanks,
Chris