Gail --
Welcome to Apple Discussions !!!
It's absolutely possible!!!
I am not an expert in networking, but I did want to share this with you.
I have an iMac flat panel, hooked up to a Linksys wireless router that is connected to a PC two floors up, plus a Mac Mini. Very honestly, the hardest part was not the Mac or the PC, it was trying to figure out the Linksys configuration. We got great help from our son-in-law who actually pulled it off.
All I wanted to say was, I know this can be done.
I'm counting on someone more knowledgeable as to specifics to come along.
I'll keep checking in on your progress . . .