As it says^^^ and what (free) program woul ddo it, currently use irfanview which works well but with 100 odd photos could take days!
Alex_gregory_uk said:use the 'image resizer' here. Good little program to batch resize pics...
http://www.microsoft.com/windowsxp/downloads/powertoys/xppowertoys.mspx
GuyS said:photoshop can
you create a new action, start recording, do the process to one photo, then go to file automate batch, select the source folder, and the action you recorded.. ta da!