I had a mac laptop at one point, but it is not operational anymore, so I am kinda shootin' from the hip on this one.
If I remember correctly, the easiest way was to find the folders that you want shared on a windows machine, and right click and go to the sharing option. From there you will share the folder with a name (you can call it share, or anything, but make it easy to remember) You will also want to give permissions to "everyone" and you will have to decide whether you want them to have full read write and delete priveleges, or just be able to access them.
Once that is done, you will need to know the internal ip address of the machine that has the shares. If you are hooked to a linksys router it will likely be 192.168.0.? (you can go to the command prompt and type in the following to find out the info "ipconfig" without the quotes.)
I don't know what the latest iteration of mac osx uses to connect to another pc, but there is an option that you can choose in there from the main window that will allow you to connect to a pc/map a network drive. At this point you can type in the address in the following way:
"\\192.168.0.101\share" and choose an open drive letter.
(this is assuming two things 1. that the ip address of the machine with the share is 192.168.0.101, and you called the share point "share")
It should then place an icon on your desktop which will act fairly familiar.
At least that is the best that I can remember.
GL and I reserve all normal disclaimers of if you blow up your crap, you are on your own
