i just replaced mine yesterday took ages but got there in the end! start by sliding the top left part of pedal under the lip then use finger to pull out the lip working way along until other top corner is on. then work down one of long edges - i found using a key to pull the lip out helps on the corners. getting the bottom edge over is hardest part. but if you have got the sides done first you just carry on stretching the lip part underneath out and it will go on. i managed it but i'm a girl with small fingers which helped!
