Help re. flyers and posters

I was talking to the vice-president of a major local printer today. Anyway, he's a sweetheart. He said that he will do 50, 100 copies, whatever I think I need. But the problem is, he's talking to someone (me) who is useless when it comes to computer language (although I am trying to learn!). Anyway....he looked at the site (we were talking over the phone and I directed him to it) and said that he couldn't print from the website because it's lower resolution particularly for the posters (he could do it, but it wouldn't be a good enough job). To do a good job, he would need the original file. Is there a higher resolution file or is that what you guys are all using. If you are using this file from the website, what size posters and flyers are you all printing out? If I knew that, then I could go back to the printer and tell him what people are doing from the site. Thanks for being so patient with me guys! (Are you there Charlie? - help)

Deb
p.s. My husband is helping me with this!! He does know a thing or two about computers - thank goodness!

Awesome Charlie! Thanks! So if I tell him what you just told me - should be no problem, right? I mean, he can do this directly from the site?

Thanks Charlie! I'll email him with that info so he'll have it Monday morning. I think that he was thinking along the line of much bigger posters - that's the reason for his questions. Hey, isn't that awesome about the number of prints he said he could do for me?

Deb