So here is my .plist for a 4 x 4 grid (but not how you would like them spaced). You can see that the first icon will be at 27,185 the second icon would be at 27,274 and the third at 27,362 and finally the fourth at 27, 450. So from that, the first row of icons will be level at an x coordinate of 27.

All you need to do is play around with the values until you find the right spacing for the columns and rows.

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Cols-Six</key> <array> <integer>27</integer> <integer>114</integer> <integer>201</integer> <integer>288</integer> </array> <key>EasyGrid</key> <true/> <key>Rows-Six</key> <array> <integer>185</integer> <integer>274</integer> <integer>362</integer> <integer>450</integer> </array> </dict> </plist>