Ok 2 things you can do.
1. Upload the pics you want to use to flickr.com and then go to all sizes and it gives you the image code for the different sizes they are offering.
2. use this program caller powertoys image resizer found here.
http://www.microsoft.com/windowsxp/...ppowertoys.mspx
Its abpout 3/4 the way down on the right hand side.This is what I use and its real easy.Right click on the photo and its the 3rd otion and then you can make it the size you want.
BTW I thought I was the only person that couldn't use the advanced otion to post. really wierd.
Hope that helps.